Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Evaluating the Delamination in the Drilling Process of a Melamine Coated Medium Density Fiberboard (MDF)
1
10
EN
Masoud
Rakhshkhorshid
0000-0002-1874-0336
Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran
rakhshkhorshid@birjandut.ac.ir
Sayyed Mohammad
Emam
0000-0002-1874-0336
Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran
sy.m.emam@birjandut.ac.ir
Mohammad
Lakhi
0000-0003-3742-3616
Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran
m.lakhi@birjand.ac.ir
Saeed
Ghahremani
0000-0001-6229-9392
Department of Mechanical Engineering, Birjand University of Technology, Birjand, Iran
sqahremani419@gmail.com
10.22055/jacm.2019.30954.1800
Medium density fiberboard (MDF) is an engineering product that is used in many industrial and general applications such as the furniture industry and kitchen cabinets. Generally, MDF products are generated by screw joints using the drilling process. However, the drilling process of the MDF panels leads to the delamination at the entrance and exit of the drill bit that should be controlled. In this work, the effect of the processing parameters including the feed rate and cutting speed on the delamination of melamine coated MDF is investigated. For this, two different tools with different tool geometry (a brad point drill bit and a commonly used twist drill bit) are examined. Image processing is used to measure the conventional delamination factor together with a new delamination factor referred to as area delamination factor for the drilled holes. It that the delamination value decreases with increasing cutting speed and increases with increasing feed rate. Though, there were some fluctuations in the results. The trend of changing the delamination respect to the investigated parameters was the same for both applied drill bits; however, the smaller value of delamination is obtained using the twist drill bit. Using the proposed area delamination factor, the effect of process parameters on the delamination is presented with higher magnitudes but with the same behavior. This, together with the ability of characterization of the water absorption of drilled holes has made the area delamination factor a more appropriate parameter to evaluate the delamination. The overall results are consistent with previously published works.
Drilling,Medium density fiberboard (MDF),delamination factor,Area delamination factor
https://jacm.scu.ac.ir/article_14900.html
https://jacm.scu.ac.ir/article_14900_e201d2a037ea742e329b5b01a079bc2d.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Numerical Simulation of Unsteady Flow toward a Stretching/Shrinking Sheet in Porous Medium Filled with a Hybrid Nanofluid
11
20
EN
Saeed
Dinarvand
0000-0002-1625-8618
Department of Mechanical Engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran
saeed_dinarvand@yahoo.com
Mohammad
Yousefi
0000-0002-6785-3353
Department of Mechanical Engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran
d.aakz.kashani@gmail.com
Ali. J
Chamkha
0000-0002-8335-3121
Faculty of Engineering, Kuwait College of Science and Technology, Doha, Kuwait
achamkha@yahoo.com
10.22055/jacm.2019.29407.1595
The purpose of this study is to present simulation and numerical solutions to the unsteady flow and heat transfer near stagnation point over a stretching/shrinking sheet in porous medium filled with a hybrid nanofluid. Water (base fluid), nanoparticles of titania and copper were considered as a hybrid nanofluid. It is worth mentioning that evaluating the heat transfer enhancement due to the use of hybrid nanofluids has recently become the center of interest for many researchers. The coupled non-linear boundary-layer equations governing the flow and heat transfer are derived and reduced to a set of coupled non-dimensional equations using the appropriate transformations and then solved numerically as a nonlinear boundary value problem by bvp4c scheme from MATLAB. To validate the modeling of hybrid nanofluid and also numerical procedure, the value of the skin friction and the heat transfer rate for the limited cases of pure water, titania/water and copper/water is obtained and compared with previously reported results that demonstrate an excellent agreement. In the present investigation, the thermal characteristics of hybrid nanofluid are found to be higher in comparison to the base fluid and fluid containing single nanoparticles, respectively. It can be concluded that both skin friction coefficient and local Nusselt number enhance almost linearly with increasing the copper nanoparticle volume fraction (as second nanoparticle). Besides, the porosity and the magnetic effect amplify heat transfer rate, while the unsteadiness parameter has a reducing effect on heat transfer rate in problem conditions.
Porous media,Magnetic,Hybrid nanofluid,Two-dimensional stagnation point,Analytic model of hybridity
https://jacm.scu.ac.ir/article_14641.html
https://jacm.scu.ac.ir/article_14641_3adebdb1278943bd64c4875b7dda2404.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Heat Transfer of Hybrid-nanofluids Flow Past a Permeable Flat Surface with Different Volume Fractions
21
35
EN
N.
Indumathi
Department of Mathematics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore - 641 020, INDIA
induramesh07@gmail.com
B.
Ganga
0000-0003-3742-1696
Department of Mathematics, Providence College for Women, Coonoor - 643 104, INDIA
gangabhose@gmail.com
R.
Jayaprakash
Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore - 641 020, INDIA
jayaprakash.rajan.2015@gmail.com
A.K.
Abdul Hakeem
0000-0003-1698-7789
Department of Mathematics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore - 641 020, INDIA
abdulhakeem6@gmail.com
10.22055/jacm.2019.14842
Nowadays, the preparation, characterization, and modeling of nanofluids are deliberated in plenty to improve the heat transfer effects. Therefore, this paper centers on the heat transfer effects of three separate hybrid nanoparticles such as Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>, and TiO<sub>2</sub>-SiO<sub>2</sub> with a base fluid such as water to gratify the advances. Analytical investigations for the Marangoni convection of different hybrid nanofluids over the flat surface for the cases such as suction, injection and impermeable were analyzed. A validation table for the comparison between analytical and numerical studies is tabulated. The influence of the hybrid nanoparticles solid volume fraction and the wall mass transfer parameter are mentioned through graphs at the side of the heat transfer rate tabulation. The impact of solid volume fraction decelerates the velocity distribution and raises the temperature distribution for all the three hybrid nanofluids in the cases of suction, impermeable, and injection. While relating the surface velocity and heat transfer rate of the three hybrid nanofluids, Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>/water has a higher surface velocity, TiO<sub>2</sub>-SiO<sub>2</sub>/water has a higher heat transfer rate and Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>/water has lower surface velocity and heat transfer rate for the increment of wall mass transfer parameter.
Hybrid-nanofluids,Permeable surface,Marangoni convection,Laplace transform,volume fraction
https://jacm.scu.ac.ir/article_14842.html
https://jacm.scu.ac.ir/article_14842_e697ffb9e7b25d34f623235718db50e8.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
A Hybrid SVM-RVM Algorithm to Mechanical Properties in the Friction Stir Welding Process
36
47
EN
Hadi
Tagimalek
0000-0001-5451-7564
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
h_tagimalek@semnan.ac.ir
Mohammad Reza
Maraki
0000-0002-4469-5305
Department of Materials and Metallurgy Engineering, Birjand University of Technology, Birjand, Iran
maraki@birjandut.ac.ir
Masoud
Mahmoodi
0000-0002-7446-6140
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
mahmoodi@semnan.ac.ir
Majid
Azargoman
0000-0003-2204-7128
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
m_azargoman@semnan.ac.ir
10.22055/jacm.2019.31017.1811
The friction stir welding method is one of the solid-state welding methods for non-homogeneous metals. In this study, the 5XXX series aluminum sample and pure copper are subjected to four passes friction welding process and then the mechanical and metallurgical properties of the welded samples are compared with the prototype. For this purpose, the effect of welding parameters including rotational speed, forward speed and pin angle of the tool is tested by the full factorial method. In this process, hardness estimation and tensile testing are based on input process parameters in order to obtain mechanical properties is an important issue. For this purpose, a mathematical model of mechanical properties must be defined based on the input process parameters. Due to the complex nature of the effect of input process parameters on mechanical properties, this modeling is a complex mathematical problem in which the use of supervised learning algorithms is considered as an efficient alternative. In this paper, a new combination of Relevance Vector Machine (RVM) and Support Vector Machine (SVM) is presented which has a higher degree of accuracy.
Friction stir welding,Hardness,Support vector machine,Relevance Vector Machine
https://jacm.scu.ac.ir/article_15253.html
https://jacm.scu.ac.ir/article_15253_3bc3bb068d226db7f7152c9a185398cb.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Investigation of Jeffery-Hamel Flow for Nanofluid in the Presence of Magnetic Field by a New Approach in the Optimal Homotopy Analysis Method
48
59
EN
Uddhaba
Biswal
0000-0003-4953-3177
Department of Mathematics, National Institute of Technology Rourkela, Rourkela-769008, Odisha, India
uddhababiswal789@gmail.com
Snehashish
Chakraverty
0000-0003-4857-644X
Department of Mathematics, National Institute of Technology Rourkela, Rourkela-769008, Odisha, India
sne_chak@yahoo.com
10.22055/jacm.2020.31909.1937
In this article, numerical study of nanofluid flow between two inclined planes is carried out under the influence of magnetic field. Water-based nanofluid with nanoparticle of Copper (Cu) is taken into consideration for the present investigation. An efficient numerical method namely Optimal Homotopy Analysis Method (OHAM) is employed to get an approximate series solution for the related governing differential equation. A new approach is proposed to determine the convergence controller parameters used in OHAM. For the validation of the proposed technique, the convergence of the obtained results is shown for different values of involved parameters. Moreover, residual errors for the different number of terms in the obtained series solution are represented graphically. Obtained numerical results from the proposed method are incorporated with the previous results and they are found to be in very good agreement. Impacts of involved parameters like nanoparticle volume fraction, Hartmann number and Reynolds number on non-dimensional velocity are also discussed.
Jeffery-Hamel flow,Nanofluid,Numerical solution,Optimal Homotopy Analysis Method,Non-linear Ordinary Differential Equation
https://jacm.scu.ac.ir/article_15275.html
https://jacm.scu.ac.ir/article_15275_a7193c5324de1f2f1027a2d4651c4c9b.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Nonlinear Convective Flow of Maxwell Fluid over a Slendering Stretching Sheet with Heat Source/Sink
60
70
EN
Mocherla
Gayatri
0000-0001-5798-1055
Department of Mathematics, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Andhra Pradesh - 522302, India
gayatri.mocherla@gmail.com
Konda
Jayaramireddy
0000-0001-7692-2659
Department of Mathematics, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Andhra Pradesh – 522302, India
jayaramireddykonda@gmail.com
Macherla
Jayachandra Babu
0000-0001-7645-6301
Department of Mathematics, S.V.A Government College, Srikalahasti, Andhra Pradesh -517644, India
jayamacharla@gmail.com
10.22055/jacm.2019.31394.1868
In this study, the features of Maxwell fluid flow through a stretching sheet (variable thickness) with heat source/sink and melting heat transfer are analyzed. Leading equations of the course are transmuted with suitable similarity transmutations and resolved the subsequent equations mathematically with shooting technique. The effects of the valid parameters on the regular profiles (velocity, concentration, temperature) are elucidated through graphs in two cases (presence and absence of melting). And also, friction factor, transfer rates (mass, heat) are examined with the same parameters and the outcomes are presented in tabular form. A few of the findings are (a) the elastic parameter upsurges the velocity (b) heat source parameter raises the temperature (c) mass transfer rate is lowered by chemical reaction.
Nonlinear convective flow,Heat source/sink,Maxwell fluid,melting parameter,shooting technique
https://jacm.scu.ac.ir/article_15143.html
https://jacm.scu.ac.ir/article_15143_2597d36c9b89de873ffafd4d041df48c.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Reduction in Space for Dynamic Finite Element Analysis of Assemblies of Beam-columns when the Mass is Available in Digitized Format
71
83
EN
Aram
Soroushian
0000-0001-50475969
Structural Engineering Research Centre, International Institute of Earthquake Engineering and Seismology, No. 21, West Arghavan, North Dibajee, Farmanieh, Tehran 19537, Iran
aramsoro@yahoo.com
Saeed
Amiri
0000-0002-0077-4298
Structural Engineering Research Centre, International Institute of Earthquake Engineering and Seismology, No. 21, West Arghavan, North Dibajee, Farmanieh, Tehran 19537, Iran
saeed.amiri.saeed@gmail.com
10.22055/jacm.2019.31603.1898
In 2008, a technique was proposed to reduce run-times in analysis of semi-discretized equation of motion against dynamic excitations available in digitized format. Later, the technique was successfully adapted to reduce numbers of degrees of freedom in finite element analysis of assemblies of beam-columns subjected to static digitized loads. In this paper, attention is paid to dynamic finite element analysis of assemblies of beam-columns. It is shown that, when the mass is available in digitized format, after small modifications in the original technique, the adaptation can simplify the analysis, regardless of the models' sizes, their linearity or non-linearity, and whether the damping is classical or non-classical. The reductions in run-time and in-core memory are considerable, while the changes in accuracy can be negligible.
Reduction in space,Dynamic finite element analysis,Beam-columns,Accuracy,Computational effort
https://jacm.scu.ac.ir/article_15244.html
https://jacm.scu.ac.ir/article_15244_390fa2244ccc2f4a88b2c4b5e29e9987.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Numerical Solution of the Time Fractional Reaction-advection-diffusion Equation in Porous Media
84
96
EN
Prashant
Pandey
0000-0001-5711-1063
Department of Mathematical Sciences. Indian Institute of Technology (BHU), Varanasi, 221005, India
camaa34re@gmail.com
Sachin
Kumar
0000-0001-5721-1463
Department of Mathematical Sciences. Indian Institute of Technology (BHU), Varanasi, 221005, India
razads312@gmail.com
J.F.
Gómez-Aguilar
0000-0001-9403-3767
CONACyT-Tecnológico Nacional de México/CENIDET, Interior Internado Palmira S/N, Col. Palmira, C.P. 62490, Cuernavaca Morelos, Mexico
jgomez@cenidet.edu.mx
10.22055/jacm.2019.30946.1796
In this work, we obtained the numerical solution for the system of nonlinear time-fractional order advection-reaction-diffusion equation using the homotopy perturbation method using Laplace transform method with fractional order derivatives in Liouville-Caputo sense. The solution obtained is very useful and significant to analyze many physical phenomenons. The present technique demonstrates the coupling of homotopy perturbation method and the Laplace transform technique using He’s polynomials, which can be applied to numerous coupled systems of nonlinear fractional models to find the approximate numerical solutions. The salient features of the present work is the graphical presentations of the numerical solution of the concerned nonlinear coupled equation for several particular cases and showcasing the effect of reaction terms on the nature of solute concentration of the considered mathematical model for different particular cases. To validate the reliability, efficiency and accuracy of the proposed efficient scheme, a comparison of numerical solutions and exact solution are reported for Burgers’ coupled equations and other particular cases of concerned nonlinear coupled systems. Here we find high consistency and compatibility between exact and numerical solution to a high accuracy. Presentation of absolute errors for given examples are reported in tabulated and graphical forms that ensure the convergence rate of the numerical scheme.
Fractional calculus,Homotopy Perturbation,He’s Polynomials,Sub-diffusion,Porous media
https://jacm.scu.ac.ir/article_15019.html
https://jacm.scu.ac.ir/article_15019_ed2e3b88af6c8e8047bf1c4088ca0590.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Distributed-parameter Dynamic Modeling and Bifurcation Analysis of a Trapezoidal Piezomagnetoelastic Energy Harvester
97
113
EN
Heshmatallah
Mohammad Khanlo
0000-0002-7913-3820
Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, 13846-63113, Iran
khanloh47@yahoo.com
Reza
Dehghani
0000-0002-5268-0402
Department of Design and Manufacturing Engineering, Graduate University of Advanced Technology, Kerman, 76311-33131, Iran
redehghani@yahoo.com
10.22055/jacm.2019.30823.1785
In this paper, the effect of the bimorph profile on the nonlinear dynamic behavior and performance of a vibratory piezomagnetoelastic energy harvester is investigated. The proposed model is composed of upper and lower piezoelectric layers on a trapezoidal cantilever beam with one attached tip magnet as well as two external magnets. The magnetic field of two external magnets generates magnetic forces and moment on the tip magnet. The bimorph structure is considered as a distributed-parameter system, and the external forces are obtained by analyzing the magnetic field of the external magnets. Equations of motion are obtained using electromagnetic Lagrange equations based on the generalized Hamilton principle and the Euler-Bernoulli beam theory. The proposed model for the bimorph and magnetic forces is validated by previously published experimental results. In order to compare the nonlinear behavior of the rectangular and trapezoidal beam profiles, the bifurcation diagrams are depicted for various control parameters such as the separation distances of the magnets, beam root width, and beam tip width. Verification of the bifurcation diagrams is performed by the phase plane portraits and Poincare maps. Also, the harvested power level is compared for different profiles of the bimorph. Moreover, the simultaneous effects of exciting frequency and bifurcation parameters on the system performance are investigated by the waterfall diagrams. The obtained results show that the trapezoidal beam profile with a lower tip width has higher performance than the rectangular beam. In trapezoidal beam profiles, the subharmonic and chaotic motions have relatively higher output powers than periodic motions.
Energy harvesting,Piezoelectric layers,Trapezoidal beam,Magnetic field,Chaotic
https://jacm.scu.ac.ir/article_15085.html
https://jacm.scu.ac.ir/article_15085_4a21c9a6cec1a29a8dd2d4c0da8e18cc.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Thermal Performance of Oscillating Blade with Various Geometries in a Straight Channel
114
128
EN
Ehsan
Izadpanah
0000-0003-2947-5766
Department of Mechanical Engineering, Persian Gulf University, Bushehr 75169, Iran
e.izadpanah@pgu.ac.ir
Milan
Yazdanian
0000-0003-1568-4794
South Pars Gas Company, Bushehr 75391/311, Iran
milan_yazdanian@yahoo.com
Mohamad Hamed
Hekmat
0000-0002-7059-6247
Department of Mechanical Engineering, Tafresh University, Tafresh 39518-79611, Iran
hekmat@tafreshu.ac.ir
Yasser
Amini
0000-0001-9006-9711
Department of Mechanical Engineering, Persian Gulf University, Bushehr 75169, Iran
aminiyasser@pgu.ac.ir
10.22055/jacm.2020.31803.1919
In this study, the effect of stationary and oscillating blades on the forced convection heat transfer in a channel is studied numerically. Simulations are performed in a fully-developed, laminar, unsteady, and incompressible flow with Reynolds number and Prandtl number equal to 100 and 1, respectively. The effects of the blade geometry, oscillating speed and oscillation angle on heat transfer and pressure drop are studied. The results are presented in terms of time-averaged Nusselt number, temperature, and vorticity distribution and the pressure drop. The results indicate that the oscillation angle, oscillating speed of the blade, and the number of the blades, affect the thermal performance of the channel. In most cases, it is observed that the effect of the oscillation angle is more than that for the oscillating speed on heat transfer enhancement. However, increasing the number of blades does not necessarily help to enhance the heat transfer, but it can slightly decrease the pressure drop.
Convection heat transfer,Oscillating blade,Blade configuration,pressure drop,Vortex shedding
https://jacm.scu.ac.ir/article_15420.html
https://jacm.scu.ac.ir/article_15420_d93c84ce91dceb690833c6f17192b1d5.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Buckling and Vibration Analysis of a Double-layer Graphene Sheet Coupled with a Piezoelectric Nanoplate
129
143
EN
Keramat
Malekzadeh Fard
0000-0002-4725-6949
Malek Ashtar University of Technology, Tehran, Iran
kmalekzadeh@mut.ac.ir
Mehdi
Khajehdehi Kavanroodi
0000-0002-2691-0972
Department of Mechanical Engineering, Semnan University, Semnan, Semnan, Iran
m.khajehdehi@semnan.ac.ir
Hosein
Malek-Mohammadi
0000-0001-7396-7480
Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Hamedan, Iran
hoseinmm15@gmail.com
Ali
Pourmoayed
0000-0002-7217-4582
Department of Mechanical Engineering, Khatmol Anbia Air Defense, Tehran, Iran
pourmoayed@mut.ac.ir
10.22055/jacm.2020.32145.1976
In this article, the vibration and buckling of a double-layer Graphene sheet (DLGS) coupled with a piezoelectric nanoplate through an elastic medium (Pasternak and Winkler models) are investigated. DLGS are subjected to biaxial in-plane forces and van der Waals force existing between each layer. Polyvinylidene fluoride (PVDF) piezoelectric nanoplate is subjected to an external electric potential. For the sake of this study, sinusoidal shear deformation theory of orthotropic plate expanded with Eringen’s nonlocal theory is selected. The results indicate that nondimensional frequency and nondimensional critical buckling load rise when the ratio of width to thickness increases. Furthermore, incrementing the effect of elastic medium parameter results in increasing the stiffness of the system and, consequently, rising nondimensional frequency and critical buckling load.
Double-Layer Graphene Sheets,Piezoelectric Nanoplate,elastic medium,Sinusoidal Shear Deformation Theory,Nonlocal Piezoelasticity Theory
https://jacm.scu.ac.ir/article_15421.html
https://jacm.scu.ac.ir/article_15421_a68f06bbc5b606d7000ca64c63aaf4d3.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Numerical Scheme based on Non-polynomial Spline Functions for the System of Second Order Boundary Value Problems arising in Various Engineering Applications
144
152
EN
Anju
Chaurasia
0000-0002-4706-3792
Department of Mathematics, Birla Institute of Technology, Allahabad-211010 (U.P.), India
anjuchaurasiya@rediffmail.com
Yogesh
Gupta
0000-0002-9285-4526
Department of Mathematics, Jaypee Institute of Information Technology, Noida-201309 (U.P.), India
yogesh4july@gmail.com
Prakash C.
Srivastava
0000-0002-5916-5067
Department of Mathematics, Birla Institute of Technology, Patna-800014 (Bihar), India
prakash_bit123@rediffmail.com
10.22055/jacm.2020.32435.2012
Several applications of computational science and engineering, including population dynamics, optimal control, and physics, reduce to the study of a system of second-order boundary value problems. To achieve the improved solution of these problems, an efficient numerical method is developed by using spline functions. A non-polynomial cubic spline-based method is proposed for the first time to solve a linear system of second-order differential equations. Convergence and stability of the proposed method are also investigated. A mathematical procedure is described in detail, and several examples are solved with numerical and graphical illustrations. It is shown that our method yields improved results when compared to the results available in the literature.
Linear System,Second-order boundary-value problems,Numerical approximation,Cubic non-polynomial spline,Convergence analysis,Error analysis
https://jacm.scu.ac.ir/article_15501.html
https://jacm.scu.ac.ir/article_15501_d2fbec3c00012c996f69c0b1e4fe0312.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
On the Analytical and Computational Methodologies for Modelling Two-wheeled Vehicles within the Multibody Dynamics Framework: A Systematic Literature Review
153
181
EN
Camilo Andrés
Manrique-Escobar
0000-0002-9917-0215
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084, Salerno, Italy
cmanriqueescobar@unisa.it
Carmine Maria
Pappalardo
0000-0003-3763-7104
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084, Salerno, Italy
cpappalardo@unisa.it
Domenico
Guida
0000-0002-2870-9199
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084, Salerno, Italy
guida@unisa.it
10.22055/jacm.2021.37935.3118
In this paper, a literature review on two-wheeled vehicle systems is methodically performed and presented. For this purpose, the principal aspects concerning the kinematic, dynamic, control, and identification features of articulated mechanical systems described within the multibody formulation approach are emphasized in this review article. First, the scientific investigations on two-wheeled vehicle modelling are chronologically described employing a historical literature review approach. This is done to set a consistent context for the subsequent developments analyzed in the paper. Then, following the systematic literature review methodology described in this work, a rich corpus of relevant documents in the time span between 2013-present. Moreover, bibliometric methods are used to construct the conceptual structure map of the research field, which also allowed for formulating a thematic classification. Thus, considering the full-texts of the identified corpus of documents, this work presents a synthetic analysis of the fundamental issues about the multibody approaches for modelling two-wheeled vehicles. Finally, future research perspectives are pointed out in this article
Two-wheeled vehicles,Bicycles,Motorcycles,kinematics and dynamics of multibody systems,Nonlinear control,system identification,systematic literature review,bibliometric analysis
https://jacm.scu.ac.ir/article_16970.html
https://jacm.scu.ac.ir/article_16970_b87f9a510471a77169a030be0fe9f790.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Dynamic Response of Functionally Graded Carbon Nanotube-Reinforced Hybrid Composite Plates
182
195
EN
Chun-Sheng
Chen
000-0002-8343-4757
Department of Mechanical Engineering, Lunghwa University of Science and Technology, Guishan Shiang 33306, Taiwan
cschen@mail.lhu.edu.tw
Chin-Ping
Fung
0000-0002-8948-4835
Department of Mechanical Engineering, Oriental Institute of Technology, Pan-Chiao 22061, Taiwan
cpfung@mail.oit.edu.tw
Hai
Wang
0000-0003-2390-4152
Department of Mechanical Engineering, Ming Chi University of Technology, Tai-Shan 24301, Taiwan
whai@mail.mcut.edu.tw
Wei-Ren
Chen
000-0002-4655-8769
Department of Mechanical Engineering, Chinese Culture University, Taipei 11114, Taiwan
wrchen@faculty.pccu.edu.tw
10.22055/jacm.2021.37884.3108
Dynamic instability behavior of functionally graded carbon nanotube reinforced hybrid composite plates subjected to periodic loadings<strong> </strong>is studied. The governing equations of motion of Mathieu-type are established by using the Galerkin method with reduced eigenfunctions transforms. With the Mathieu equations, the dynamic instability regions of hybrid nanocomposite plates are determined by using the Bolotin’s method. Results reveal that the dynamic instability is significantly affected by the carbon nanotube volume fraction, layer thickness ratio, bending stress, static and dynamic load parameters. The effects of important parameters on the instability region and dynamic instability index of hybrid nanocomposite plates are discussed.
Functionally graded,volume fraction,dynamic instability regions,dynamic instability index
https://jacm.scu.ac.ir/article_16974.html
https://jacm.scu.ac.ir/article_16974_75b67b00a8051953098056d6a8b97f4b.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Nonstandard Dynamically Consistent Numerical Methods for MSEIR Model
196
205
EN
Ali
Shokri
0000-0003-2699-1490
Department of Mathematics, Faculty of Basic Science, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran
shokri2090@gmail.com
Mohammad
Mehdizadeh Khalsaraei
0000-0002-0130-0449
Department of Mathematics, Faculty of Basic Science, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran
mehdizadeh@maragheh.ac.ir
Maryam
Molayi
0000-0001-6395-9161
Department of Mathematics, Faculty of Basic Science, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran
m.molayi.66@gmail.com
10.22055/jacm.2021.36545.2863
In this paper, two numerical methods for solving the MSEIR model are presented. In constructing these methods, the non-standard finite difference strategy is used. The new methods preserve the qualitative properties of the solution, such as positivity, conservation law, and boundedness. Numerical results are presented to express the efficiency of the new methods.
positivity,Boundedness,Nonstandard Finite Difference
https://jacm.scu.ac.ir/article_16581.html
https://jacm.scu.ac.ir/article_16581_aef3471f9b56c496dbf7dcaeb8391616.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Non-similar Radiative Bioconvection Nanofluid Flow under Oblique Magnetic Field with Entropy Generation
206
218
EN
Nisha
Shukla
0000-0002-6780-2433
Department of Mathematics, Institute of Applied Science and Humanities, GLA University, Mathura-281406, Uttar Pradesh, India
kaushiknisha802@gmail.com
Puneet
Rana
0000-0002-9850-763X
School of Mathematical Sciences, College of Science and Technology, Wenzhou Kean University, Wenzhou 325060, China
puneetranaiitr@gmail.com
Sireetorn
Kuharat
Aeronautical and Mechanical Engineering, University of Salford, Newton Building, M54WT, UK
s.kuharat@edu.salford.ac.uk
Osman
Anwar Bég
Aeronautical and Mechanical Engineering, University of Salford, Newton Building, M54WT, UK
gortoab@gmail.com
10.22055/jacm.2020.33580.2250
Motivated by exploring the near-wall transport phenomena involved in bioconvection fuel cells combined with electrically conducting nanofluids, in the present article, a detailed analytical treatment using homotopy analysis method (HAM) is presented of <em>non-similar bioconvection flow of a nanofluid under the influence of magnetic field (Lorentz force) and gyrotactic microorganisms</em>. The flow is induced by a stretching sheet under the action of an oblique magnetic field. In addition, nonlinear radiation effects are considered which are representative of solar flux in green fuel cells. A second thermodynamic law analysis has also been carried out for the present study to examine entropy generation (irreversibility) minimization. The influence of magnetic parameter, radiation parameter and bioconvection Rayleigh number on skin friction coefficient, Nusselt number, micro-organism flux and entropy generation number (EGN) is visualized graphically with detailed interpretation. Validation of the HAM solutions with published results is also included for the non-magnetic case in the absence of bioconvection and nanofluid effects. The computations show that the flow is decelerated with increasing magnetic body force parameter and bioconvection Rayleigh number whereas it is accelerated with stronger radiation parameter. EGN is boosted with increasing Reynolds number, radiation parameter and Prandtl number whereas it is reduced with increasing inclination of magnetic field.
Non-similar,Bioconvection,Entropy,Oblique magnetic field,Homotopy Analysis Method
https://jacm.scu.ac.ir/article_15687.html
https://jacm.scu.ac.ir/article_15687_89fac9d02dcf31a35f55c6be37609190.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Thermal Analysis of Radiating Film Flow of Sodium Alginate using MWCNT Nanoparticles
219
231
EN
Akinbowale T.
Akinshilo
000-0002-6436-3420
Department of Mechanical Engineering, University of Lagos, Akoka-Yaba, Nigeria
ta.akinshilo@gmail.com
Amin
Davodi
000-0003-2015-6064
Department of Civil and Mechanical Engineering, Babol University of Technology, Babol, Iran
a.g.davodi@gmail.com
Adeleke
Ilegbusi
000-0001-8421-1873
Department of Mechanical Engineering, Yaba College of Technology, Yaba, Nigeria
illegbusi@gmail.com
Gbeminiyi
Sobamowo
0000-0003-2402-1423
Department of Mechanical Engineering, University of Lagos, Akoka-Yaba, Nigeria
mikegbeminiyi@gmail.com
10.22055/jacm.2020.33386.2218
Heat transfer of fluids plays an important role in process flows, as this has significant impacts in process configurations, energy pricing and utilization. Therefore, this paper, the heat and mass transfer of a radiating non-Newtonian Sodium alginate transported through parallel squeezing plates is examined. The radiating-squeezing fluid flows through the parallel plates arranged vertically against each other with multi walled carbon nanotube (MWCNT) particles. Transport mechanics and thermal conditions of the Sodium alginate is studied using systems of coupled nonlinear models. This higher order, governing ordinary differential models are used to analyze the thermal and mass transfer of the nanofluid using the adomian decomposition method. Results obtained from analytical study displayed graphically are used to investigate effect of thermal radiation on film flow of MWCNT nanoparticles on the Sodium alginate. As revealed from result, concentration increase of MWCNT nanoparticles increases thermal profile significantly. This can be physically explained owing to increasing concentration, increases thickness of thermal boundary due to conductivity enhancement of fluid. Improved thermal diffusivity drops thermal gradient which reduces heat transfer. Whereas, radiation effect on fluid transport shows decrease in heat transfer as thermal conductivity becomes lower than temperature gradient of the flow. Obtained analysis when compared against other methods of solution (numerical and approximate analytical) proves satisfactory. Therefore, the results obtained from the work provides a good basis for the application and improvement of the Sodium alginate in medical, pharmaceutical and manufacturing industries among other practical application.
Sodium alginate,MWCNT particles,heat transfer,fluid transport,Adomian Decomposition Method
https://jacm.scu.ac.ir/article_15577.html
https://jacm.scu.ac.ir/article_15577_79a80c0008f9262c700226a5f1e19b18.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Development of an Educational Code of Deriving Equations of Motion and Analyzing Dynamic Characteristics of Multibody Closed Chain Systems using GNU Octave for a Beginner
232
244
EN
Y.H.
Park
0000-0001-6716-6935
Department of Mechanical Engineering, Yuhan University, 590, Gyeongin-ro, Bucheon-si, Gyeonggi-do, Republic of Korea
yonghuipark216@gmail.com
10.22055/jacm.2021.38021.3132
In this study, an automatic GNU Octave code, a free high-level language, for the educational purposes was developed to derive equations of motion and constrain equations of a multibody closed chain system and to calculate the response of the system. The code for calculating the dynamic response was developed by formulating several equations in symbolic expression and extracting differential-algebraic equations in matrix form. The code has a similar structure to the previous code for the open chained system, but it deals with the constraint equation and different numerical integration. The examples of closed chain systems provide an additional procedure to derive the constraint equations by using Lagrangian multiplication theory and to solve the differential-algebraic equations using the Runge-Kutta method. The code was made to understand the theory of analysis and the structure of calculation easily. In addition, the code has an automatic process of the derivation of the Lagrange equation and the constraint equations in matrix form after inputting the number of symbolic information such as position and velocity coordinates and design variables of the system that the user wants to review. The code was validated by comparing the dynamic response of the four-bar linkage with the same design variables and initial conditions of the previous work. By using the code, the reader's ability to exchange information such as symbols and matrices will be expected to be improved.
GNU Octave,Multi-body dynamics,Closed chain,Lagrange multiplier,Differential Algebraic Equation,Automation
https://jacm.scu.ac.ir/article_17099.html
https://jacm.scu.ac.ir/article_17099_dfab730718d9499df8a212038e982383.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Prediction Capabilities of a One-dimensional Wall-flow Particulate Filter Model
245
259
EN
Andrea
Natale
Impiombato
0000-0003-1103-8058
Department of Industrial Engineering (DIN), School of Engineering and Architecture, Alma Mater Studiorum - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
andrea.impiombato2@unibo.it
Cesare
Biserni
0000-0003-0081-2036
Department of Industrial Engineering (DIN), School of Engineering and Architecture, Alma Mater Studiorum - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
cesare.biserni@unibo.it
Massimo
Milani
0000-0001-6257-6919
Department of Science and Methods for Engineering, University of Modena and Reggio Emilia, Viale A. Allegri 9, 42121 Reggio Emilia, Italy
massimo.milani@unimore.it
Luca
Montorsi
0000-0002-4910-5693
Department of Science and Methods for Engineering, University of Modena and Reggio Emilia, Viale A. Allegri 9, 42121 Reggio Emilia, Italy
luca.montorsi@unimore.it
10.22055/jacm.2021.38708.3270
This work is focused on the formulation of a numerical model for prediction of flow field inside a particulate filter. More specifically, a one-dimensional mathematical model of the gas flow in a particulate trap-cell is deduced and solved numerically. The results are given in terms of velocity, pressure, and filtration velocity. In addition, the dependence of the pressure drop on the main governing parameters has been investigated. More specifically, the permeability of the porous medium and the hydraulic diameter play a fundamental role in the pressure drop.
Particulate filter model,Porous media,Non-dimensional approach,Numerical approach
https://jacm.scu.ac.ir/article_17101.html
https://jacm.scu.ac.ir/article_17101_d0cfbdfacfda8de6e91531b7909ed96a.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Computational Enhancement of a Mixed 3D Beam Finite Element with Warping and Damage
260
281
EN
Paolo
Di Re
0000-0002-3093-2728
Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, Rome, 00184, Italy
paolo.dire@uniroma1.it
Daniela
Addessi
https://orcid.org/00
Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Eudossiana 18, Rome, 00184, Italy
daniela.addessi@uniroma1.it
10.22055/jacm.2021.37948.3120
This paper describes the computational aspects of the beam Finite Element formulation recently developed by the authors to simulate the nonlinear response of structural members subjected to shear and torsion, accounting for cross-section warping. The paper focuses on an efficient consistent solution algorithm that by-passes the iterative procedure required in force-based and mixed Finite Elements and makes the model easy to be implemented in a standard code. Moreover, it proposes a new non-iterative technique to condense out the stress components derived by the three-dimensional constitutive response and not directly included in the fiber section formulation. The efficiency and accuracy of the proposed numerical model are validated by simulating the response of steel and reinforced concrete structural members.
Mixed Finite Element,Enhanced beam formulation,Warping,Nonlinear Analysis,Damage
https://jacm.scu.ac.ir/article_17104.html
https://jacm.scu.ac.ir/article_17104_f76c2cbff40b5e875e2b7ec809483478.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Mixed Convection Heat Transfer and Entropy Generation in a Water-filled Square Cavity Partially Heated from Below: The Effects of Richardson and Prandtl Numbers
282
297
EN
Nawal
Ferroudj
0000-0001-7743-0971
Faculty of Process Engineering, University of Salah Boubnider Constantine 3, 25016, Algeria
n.ferroudj@ensbiotech.edu.dz
Hasan
KÖTEN
0000-0002-1907-9420
Mechanical Engineering Department, Computational Fluid Dynamics Laboratory, Istanbul Medeniyet University, Turkey
hasan.koten@medeniyet.edu.tr
Saadoun
Boudebous
0000-0003-0136-0748
Faculty of Sciences and Applied Sciences, University of Larbi BenM'hidi, Oum el Bouaghi, 04000 , Algeria
s.boudebous@gmail.com
10.22055/jacm.2021.38614.3259
In the present study, fluid flow, heat transfer, and entropy generation for mixed convection inside a water-filled square cavity were investigated numerically. The sidewalls of the cavity, which move upwards, are kept at low-temperature <em>Tc</em> while only a part in the center of the bottom wall is kept at high-temperature <em>Th</em> and the remaining parts are kept adiabatic. The governing equations, in stream function–vorticity form, are discretized and solved using the finite difference method. Particular attention was paid to the influence of the Prandtl numbers of 5.534, 3.045 and 2, corresponding respectively to the water temperatures of 303.15 K, 333.15 K and 363.15 K. The numerical results are presented in the form of streamlines, isotherms, and entropy generation contours for different values of the Richardson numbers at an arbitrary Reynolds number Re=10<sup>2</sup>. Besides this, the evolution of the average Nusselt number and the average entropy generation is also reported. The obtained results show interesting behaviors of the flow and thermal fields, which mainly involve stable symmetric and non-symmetric steady-state solutions, as well as unsteady regimes, depending on specific values of the Richardson and Prandtl numbers. It is additionally observed that the average Nusselt number increases and the average entropy generation decreases when both the Richardson and Prandtl numbers increase.
Mixed convection,Entropy generation,Finite difference method,Prandtl number,Richardson number,Nusselt Number
https://jacm.scu.ac.ir/article_17105.html
https://jacm.scu.ac.ir/article_17105_dbefbab1e91cbb493c8b14824ff3339b.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Investigation of Wood Properties at Elevated Temperature
298
305
EN
Anatoliy M.
Bragov
0000-0002-3122-2613
National Research Lobachevsky State University of Nizhny Novgorod, Gagarin ave. 23, Nizhny Novgorod, 603950, Russian Federation
bragov@mech.unn.ru
Tatiana N.
Iuzhina
0000-0001-6507-9547
National Research Lobachevsky State University of Nizhny Novgorod, Gagarin ave. 23, Nizhny Novgorod, 603950, Russian Federation
tatiana.iuzhima@mech.unn.ru
Andrey K.
Lomunov
0000-0002-5966-2389
National Research Lobachevsky State University of Nizhny Novgorod, Gagarin ave. 23, Nizhny Novgorod, 603950, Russian Federation
lomunov@mech.unn.ru
Leonid
A.
Igumnov
0000-0003-3035-0119
National Research Lobachevsky State University of Nizhny Novgorod, Gagarin ave. 23, Nizhny Novgorod, 603950, Russian Federation
gumnov@mech.unn.ru
Alexandr
A.
Belov
0000-0003-3704-048X
National Research Lobachevsky State University of Nizhny Novgorod, Gagarin ave. 23, Nizhny Novgorod, 603950, Russian Federation
belov_a2@mech.unn.ru
Victor A.
Eremeyev
0000-0002-8128-3262
Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, Gdansk, 80-233, Poland
eremeyev.victor@gmail.com
10.22055/jacm.2021.38486.3239
The results of dynamic compression tests of aspen under elevated temperature up to +60°C are presented. The tests were carried out based on the Kolsky method using the split Hopkinson pressure bar. To study the anisotropy of properties, aspen samples were fabricated and tested by cutting along and across the fibers direction. Dynamic stress-strain curves were obtained as well as the average values of modulus of active loading sites. The greatest steepness of the loading branches and the highest breaking stresses are observed for the samples loaded along the fiber direction, while the smallest values are noted under loading across the fiber direction. Also the effect of elevated temperature on strength and deformation properties of aspen is estimated.
wood,aspen,strain diagrams,strain rate,Kolsky method
https://jacm.scu.ac.ir/article_17107.html
https://jacm.scu.ac.ir/article_17107_3e1761bd855de62200789423d2d26b62.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Numerical Investigation of Enhanced Oil Recovery from various Rocks by Nanosuspensions Flooding
306
318
EN
D.V.
Guzei
0000-0003-2226-1837
Siberian Federal University, Krasnoyarsk, Russia, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
dguzey@sfu-kras.ru
A.V.
Minakov
0000-0003-1956-5506
Siberian Federal University, Krasnoyarsk, Russia, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
aminakov@sfu-kras.ru
M.I.
Pryazhnikov
0000-0001-9143-7950
Siberian Federal University, Krasnoyarsk, Russia, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
mpryazhnikov@sfu-kras.ru
S.V.
Ivanova
0000-0002-7803-6471
Siberian Federal University, Krasnoyarsk, Russia, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
svivanova@sfu-kras.ru
10.22055/jacm.2021.38217.3182
This work is devoted to the systematic numerical simulation of oil displacement using nanosuspension with silicon oxide particles with concentration of up to 1 wt% and particle sizes of 5 nm. The influence of such factors as core wettability, concentration of nanoparticles, capillary number, and oil viscosity on the enhanced oil recovery by nanosuspension has been systematically investigated using the VOF method for 2D-dimensional micromodels. Various rocks were considered: dolomite, metabasalt and sandstone. It is shown that the oil recovery coefficient improves for all considered types of rock with increasing nanoparticle concentration. The most effective application of nanosuspension for enhanced oil recovery is observed at a low capillary number, corresponding to the capillary displacement mode. The addition of nanoparticles facilitates increasing oil recovery factor in a wide range of viscosity ratios between oil and displacement fluid.
oil recovery factor,wettability,VOF method,Numerical simulation,nanosuspension
https://jacm.scu.ac.ir/article_17139.html
https://jacm.scu.ac.ir/article_17139_4922b5c31fe567521379ebd5bac83ed5.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Proportional Topology Optimization under Reliability-based Constraints
319
330
EN
Rodrigo
Reis
Amaral
0000-0001-9035-5806
Graduate Program in Mechanical Engineering, Federal University of Rio Grande do Sul, Av. Sarmento Leite, 425, Sala 202, 2º Andar, 90050-170, Porto Alegre, RS. Brazil
rodrigo_amaral_23@hotmail.com
Julian
Alves
Borges
0000-0002-0986-7634
Graduate Program in Civil Engineering, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha, 99, 3º Andar, 90035-190, Porto Alegre, RS. Brazil
jlnab@hotmail.com
Herbert
Martins
Gomes
https://orcid.org/00
Graduate Program in Mechanical Engineering, Federal University of Rio Grande do Sul, Av. Sarmento Leite, 425, Sala 202, 2º Andar, 90050-170, Porto Alegre, RS. Brazil
herbert@mecanica.ufrgs.br
10.22055/jacm.2021.38440.3226
Topology optimization is a methodology widely used in the design phase that has gained space in engineering. On the other hand, uncertainty is present in material properties, loads, and boundary conditions in practically any design. The main goal for this paper lies in the coupling of the two subjects to account for uncertainties in the topology optimization. The Proportional Topology Optimization method renders the possibility of treating the stress constraints in a unified way. This allows topologies that at the same time preserve structural reliability and optimize costs. The Proportional Topology Optimization method under the reliability constraint is presented for isostatic and hyperstatic beam examples with stress and displacement LSF.
PTO,Reliability analysis,uncertainty analysis,reliability-based topology optimization
https://jacm.scu.ac.ir/article_17136.html
https://jacm.scu.ac.ir/article_17136_c137616c63863725399fdb9b6372c912.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Dynamic Response of a Step Loaded Cubic Cavity Embedded in a Partially Saturated Poroelastic Half-space by the Boundary Element Method
331
339
EN
Andrey
Petrov
0000-0001-5277-9384
National Research Lobachevsky State University of Nizhny Novgorod, 23 Gagarin av. bld. 6, Nizhny Novgorod, 603950, Russia
andrey.petrov@mech.unn.ru
Mikhail
Grigoryev
0000-0002-4203-1775
National Research Lobachevsky State University of Nizhny Novgorod, 23 Gagarin av. bld. 6, Nizhny Novgorod, 603950, Russia
grigorev@mech.unn.ru
Leonid
Igumnov
0000-0003-3035-0119
National Research Lobachevsky State University of Nizhny Novgorod, 23 Gagarin av. bld. 6, Nizhny Novgorod, 603950, Russia
igumnov@mech.unn.ru
Alexandr
Belov
0000-0003-3704-048X
National Research Lobachevsky State University of Nizhny Novgorod, 23 Gagarin av. bld. 6, Nizhny Novgorod, 603950, Russia
belov_a2@mech.unn.ru
Victor
Eremeyev
0000-0002-8128-3262
Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, Gdansk, 80-233, Poland
eremeyev.victor@gmail.com
10.22055/jacm.2021.38487.3240
The boundary element method is used to analyze the problem of dynamic loading acting inside a cubic cavity located in a partially saturated poroelastic halfspace. Defining relations of a Biot’s porous medium are used, which are written in Laplace representations for unknown functions of displacements of the skeleton and pore pressures of the fillers. Solutions in time are obtained using the stepped method of numerical inversion of Laplace transforms. Dynamic responses of displacements and pore pressures at points on the surface of the halfspace and the cavity have been constructed. The effect of the values of the saturation coefficient and of the depth of the location of the cavity on dynamic responses has been studied.
Poroelastic half-space,embedded cubic cavity,step load,Boundary element method,Laplace transform
https://jacm.scu.ac.ir/article_17153.html
https://jacm.scu.ac.ir/article_17153_2d15b53742d48c3cd244ea2f5755c884.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Geometric Optimization of Jet Pump Used in Vacuum Distillation Applications under Different Operating Conditions using Genetic-algorithm Methods
340
358
EN
William
Orozco Murillo
0000-0003-4115-0286
Grupo de Investigación e Innovación Ambiental, Facultad de Ingeniería, I.U. Pascual Bravo. Calle 73 # 73A – 226. 050034 Medellín, Colombia
william.orozco@pascualbravo.edu.co
Iván D.
Patiño Arcila
0000-0002-2876-8930
Grupo de Investigación e Innovación Ambiental, Facultad de Ingeniería, I.U. Pascual Bravo. Calle 73 # 73A – 226. 050034 Medellín, Colombia
i.patinoar@pascualbravo.edu.co
José A.
Palacio-Fernández
0000-0002-9207-7077
Grupo de Investigación e Innovación Ambiental, Facultad de Ingeniería, I.U. Pascual Bravo. Calle 73 # 73A – 226. 050034 Medellín, Colombia
josealpa@pascualbravo.edu.co
10.22055/jacm.2021.38411.3228
Genetic-algorithm methods are used here for single-objective (SO) and multi-objective (MO) geometrical optimizations of jet pumps used in vacuum distillation of ethanol, an application not deeply studied in scientific literature. These devices are particularly suitable to allow the azeotrope-breaking below the atmospheric pressure at ambient temperature. Based on this, different working pressures (P<sub>p</sub>), five non-dimensional geometrical parameters that can influence the jet pump operation, and three performance parameters (drag coefficient, pressure recovery ratio and energy efficiency) are considered in this work. Furthermore, using a central composite, face-centered, enhanced experimental design, 89 simulation experiments are run to obtain Response Surfaces (RS) by genetic aggregation, applying afterwards the SOGA and MOGA optimization methods. Also, Spearman Rank-order correlation matrix is employed as initial screening, finding strongly negative correlation of drag coefficient and efficiency with the working pressure, P<sub>p</sub>. Computational Fluid Dynamic (CFD) model is validated with other numerical and experimental works, obtaining satisfactory results. Additionally, the change of the optimized input and output parameters with P<sub>p</sub> is studied, along with the behavior of Mach number. It can be concluded that the optimal nozzle parameters evidently influenced by P<sub>p</sub> for the SO optimization are: outlet diameter and length of divergent part, conicity of convergent part, and ratio of inlet to throat area. For the MO optimization, changes of optimized geometrical parameters with P<sub>p</sub> are negligible. In contrast, performance parameters are importantly influenced by P<sub>p</sub> for all optimizations.
Computational fluid dynamics,jet pump performance,geometrical optimization,genetic-algorithm methods,working pressure
https://jacm.scu.ac.ir/article_17155.html
https://jacm.scu.ac.ir/article_17155_1448335d1e405c8802469023e6977aa8.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Mechanical Characterisation and Comparison of Hyperelastic Adhesives: Modelling and Experimental Validation
359
369
EN
Francisco J.
Simon Portillo
0000-0003-1954-6743
Department of Mechanical and Energy Engineering, Universidad Miguel Hernández, Elche, 03202, Spain
f.simon@umh.es
Óscar
Cuadrado Sempere
0000-0002-4376-5033
Department of Mechanical and Energy Engineering, Universidad Miguel Hernández, Elche, 03202, Spain
ocuadrado@umh.es
Eduardo A.S.
Marques
Department of Mechanical and Energy Engineering, Universidad Miguel Hernández, Elche, 03202, Spain
emarques@fe.up.pt
Miguel
Sánchez Lozano
0000-0002-7520-8522
Institute of Science and Innovation in Mechanical and Industrial Engineering (INEGI), Porto, 4200-465, Portugal
msachez@umh.es
Lucas F.M.
da Silva
0000- 0003-3272-4591
Department of Mechanical Engineering, Faculty of Engineering, University of Porto, Porto, 4200-465, Portugal
lucas@fe.up.pt
10.22055/jacm.2021.38119.3242
This work focuses on the mechanical characterisation of adhesives with hyperelastic behaviour, and on the determination of the behavioural laws that best represent them, in order to be able to introduce them into simulation models. There are virtually no references to the characterisation of these materials in the literature, so it has been decided to use the methodologies commonly employed with other hyperelastic materials, such as rubber, whose behaviour is similar to that of highly flexible adhesives. Firstly, a test plan is carried out on simple specimens, uniaxial and planar configurations, designed to measure the non-linear behaviour of the adhesives in both tension and shear. Subsequently, using finite element models of the tested specimens, different behavioural laws from those usually used for the representation of hyperelastic materials are tested. Based on the experimental results, the parameters of the different laws proposed are adjusted, and the results are compared. In conclusion, it has been determined that the Mooney-Rivlin model is the one that allows the best fit, and therefore may be the most suitable to represent the behaviour of hyperelastic adhesives. For the adhesive used in this work, the obtained law has been validated by comparing the results of tests on single lap adhesive join (SLJ) specimens with the results predicted by the simulation.
Flexible adhesive,Hyperelastic models,Mechanical characterisation,Finite element analysis
https://jacm.scu.ac.ir/article_17158.html
https://jacm.scu.ac.ir/article_17158_2a9afdc328bb755325e82ffd8c31f9d2.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Effects of Periodic Loading on Longitudinal Fracture in Viscoelastic Functionally Graded Beam Structures
370
378
EN
Victor
Rizov
0000-0002-0259-3984
Department of Technical Mechanics, University of Architecture, Civil Engineering and Geodesy, 1 Chr. Smirnensky blvd., Sofia, 1046, Bulgaria
v_rizov_fhe@uacg.bg
10.22055/jacm.2021.37953.3141
This paper analyzes the effects of periodic external loading on the longitudinal fracture of a beam structure made of linear viscoelastic material. A longitudinal crack splits the cracked part of the beam into left-hand and right-hand crack arms. The beam is under a bending moment applied at the free end of the right-hand crack arm. The bending moment varies periodically with time. The material of the beam is continuously inhomogeneous (functionally graded) along the thickness. Thus, the modulus of elasticity and the coefficient of viscosity of the material vary continuously in transversal direction of the beam. The balance of the energy in the beam under periodic bending moment is analyzed in order to derive the strain energy release rate for the longitudinal crack. The solution is verified by deriving the strain energy release rate by analyzing of the compliance of the beam subjected to periodic bending moment. An investigation is carried-out by applying the solutions obtained in order to evaluate the effects of the parameters of the periodic loading on the strain energy release rate.
Viscoelastic beam,inhomogeneous material,longitudinal fracture,Functionally graded structure,Periodic loading
https://jacm.scu.ac.ir/article_17182.html
https://jacm.scu.ac.ir/article_17182_b175da95eee175e411f9bde7bd2e9c55.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Modeling of the Dynamic Rail Deflection using Elastic Wave Propagation
379
387
EN
Dmytro
Kurhan
0000-0002-9448-5269
Department of Transport Infrastructure, Dnipro National University of Railway Transport named after Academician V. Lazaryan, Lazaryan st. 2, Dnipro, 49010, Ukraine
kurhan.d@diit.edu.ua
Szabolcs
Fischer
0000-0001-7298-9960
Department of Transport Infrastructure and Water Resources Engineering, Széchenyi István University, Egyetem tér 1, Győr, 9026, Hungary
fischersz@sze.hu
10.22055/jacm.2021.38826.3290
There is a class of tasks that requires considering the dynamics not only for rolling stock but also for the response of the railway track. One of the directions of railway transport development, which encourages the transition to fundamentally new dynamic models of the railway track, is undoubtedly an increase in traffic speed. To solve such problems, the authors applied a model of the stressed-strained state of a railway track based on the dynamic problem of elasticity theory. The feature of this model is the calculation of dynamic stresses and deformations induced by the spread of elastic waves through the objects of the railway track. Based on the mathematical modeling of stress propagation in the under-rail basis, authors have shown the influence of various objects of a railway track on the formation of the outline of the front of the elastic wave and determined the main time intervals. Furthermore, the authors propose the following analytical method, which, in addition to the soil's physical and mechanical properties, considers the properties of the ballast as a layer that transmits pressure to the roadbed and takes an active part in the formation of the interaction space.
railway,ballast,stressed-strained state,dynamic stress,elastic wave
https://jacm.scu.ac.ir/article_17181.html
https://jacm.scu.ac.ir/article_17181_8c5ae4babf5fb9a23199747544326b14.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
8
1
2022
01
01
Numerical Analysis on the Bond Performance of Different Anchored Joints under Monotonic and Cyclic Pull-push Loading
388
404
EN
Rui
Micaelo
0000-0001-9910-1458
CERIS, CESUR and Department of Civil Engineering, NOVA School of Science and Technology, Portugal
ruilbm@fct.unl.pt
Marta
Verdete
0000-0003-2799-305X
UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Largo da Torre, Caparica, 2825-149, Portugal
mip.carvalho@fct.unl.pt
Raquel
Almeida
0000-0002-6828-6231
UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Largo da Torre, Caparica, 2825-149, Portugal
raa@fct.unl.pt
Wan-Yang
Gao
0000-0002-2187-3615
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
wanyanggao@sjtu.edu.cn
Hugo
Biscaia
0000-0002-4791-5123
UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Largo da Torre, Caparica, 2825-149, Portugal
hb@fct.unl.pt
10.22055/jacm.2021.38500.3266
This study aims to mitigate the gap of knowledge on the cyclic bond behaviour of Carbon Fiber Reinforced Polymer (CFRP) bonded onto a steel substrate. The Distinct Element Method was used to model different bonding techniques such as Externally Bonded Reinforcement (for reference purposes); the linear increase of the width of the CFRP composite; the assumption of a mixed adhesive; and using an additional steel plate bonded on the top of the CFRP. Compared with the monotonic loading simulations, the load capacity and ductility of the joints with the lowest overlapped bonded lengths decreased with the number of cycles. However, the strength of the CFRP-to-steel joints was not affected if the overlapping bonded joint had a long length.
Bond,Cyclic loading,damage,Numerical simulations,Distinct Element Method
https://jacm.scu.ac.ir/article_17185.html
https://jacm.scu.ac.ir/article_17185_8551baa121cc039f50fec48fa45ef9ec.pdf