Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Nonlinear Dynamic Response of Functionally Graded Porous Plates on Elastic Foundation Subjected to Thermal and Mechanical Loads
245
259
EN
Nguyen
Dinh Duc
Advanced Materials and Structures Laboratory, VNU-Hanoi - University of Engineering and Technology (UET), Hanoi, 100000, Vietnam | Infrastructure Engineering Program -VNU-Hanoi, Vietnam-Japan University (VJU),
Hanoi, 100000, Vietnam
ducnd@vnu.edu.vn
Vu Dinh
Quang
Infrastructure Engineering Program -VNU-Hanoi, Vietnam-Japan University (VJU),
Hanoi, 100000, Vietnam
quangvd2510@gmail.com
Pham Dinh
Nguyen
Advanced Materials and Structures Laboratory, VNU-Hanoi - University of Engineering and Technology (UET), Hanoi, 100000, Vietnam
tmc.ksxd@gmail.com
Trinh Minh
Chien
Department of Civil and Environmental Engineering, Sejong University, 98 Gunja Dong, Gwangjin Gu, Seoul, 143-747, South Korea
t.m.chien@yahoo.com
10.22055/jacm.2018.23219.1151
In this paper, the first-order shear deformation theory is used to derive theoretical formulations illustrating the nonlinear dynamic response of functionally graded porous plates under thermal and mechanical loadings supported by Pasternak’s model of the elastic foundation. Two types of porosity including evenly distributed porosities (Porosity-I) and unevenly distributed porosities (Porosity-II) are assumed as effective properties of FGM plates such as Young’s modulus, the coefficient of thermal expansion, and density. The strain-displacement formulations using Von Karman geometrical nonlinearity and general Hooke’s law are used to obtain constitutive relations. Airy stress functions with full motion equations which is employed to shorten the number of governing equations along with the boundary and initial conditions lead to a system of differential equations of the nonlinear dynamic response of porous FGM plates. Considering linear parts of these equations, natural frequencies of porous FGM plates are determined. By employing Runge-Kutta method, the numerical results illustrate the influence of geometrical configurations, volume faction index, porosity, elastic foundations, and mechanical as well as thermal loads on the nonlinear dynamic response of the plates. Good agreements are obtained in comparison with other results in the literature.
Nonlinear dynamic response, Porosity,Porous plates, First order shear deformation theory, Stress function
http://jacm.scu.ac.ir/article_13360.html
http://jacm.scu.ac.ir/article_13360_3116a49d3d02a64431d8d692fd83c1e3.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Stability Analysis of a Strongly Displacement Time-Delayed Duffing Oscillator Using Multiple Scales Homotopy Perturbation Method
260
274
EN
Yusry
El-Dib
Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt
yusryeldib52@hotmail.com
10.22055/jacm.2017.23591.1164
In the present study, some perturbation methods are applied to Duffing equations having a displacement time-delayed variable to study the stability of such systems. Two approaches are considered to analyze Duffing oscillator having a strong delayed variable. The homotopy perturbation method is applied through the frequency analysis and nonlinear frequency is formulated as a function of all the problem’s parameters. Based on the multiple scales homotopy perturbation method, a uniform second-order periodic solution having a damping part is formulated. Comparing these two approaches reveals the accuracy of using the second approach and further allows studying the stability behavior. Numerical simulations are carried out to validate the analytical finding.
Homotopy perturbation method,Multiple scales method,Frequency analysis,Periodic nonlinear solution,Stability analysis,Displacement delay Duffing oscillator
http://jacm.scu.ac.ir/article_13341.html
http://jacm.scu.ac.ir/article_13341_85286f1ed04010b602fd153c5f7cb9f3.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Determination of the Optimal Reduction Ratio for Least Springback during Cold Drawing of Seamless Tubes
275
285
EN
D.
B.
Karanjule
Research Scholar, Sinhgad College of Engineering, Vadgaon, Pune, M.S., 411041, India
dadakaranjule1234@gmail.com
S.
S.
Bhamare
Dr.Babasaheb Ambedkar Technological University, Lonere, Raigad, M.S., 402103, India
sunilsbhamare@gmail.com
T.
H.
Rao
Research and Development Department, Indian Seamless Metal Tubes Limited,
Ahmednagar, M.S., 414001, India
hrthota@yahoo.co.in
10.22055/jacm.2018.24156.1174
Cold drawing process is one of the most used metals forming processes in industries for forming seamless tubes. This process of plastic deformation of metals occurs below the recrystallization temperature and is generally performed at room temperature. When metal is cold worked, upon the release of forming force, the springback occurs. In this paper, the springback effect of the seamless tube that has undergone cold drawing is studied for three different reduction ratios viz.10-15 %,15-20 %, and 20-25 % having the aim to reduce it. Experiments are conducted under different reduction ratios with working conditions of die semi angles of 10 and 15 degrees, die land width of 5 mm and 10 mm as well as drawing speed of 4, 6, and 8 m/min for C-45 tube material. Optimum reduction ratio is finalized using Statistical Package for Social Science (SPSS) software of data analysis using statistical tests like Kruskal-Wallis, ANOVA, Post-hoc, etc. Metallurgical analysis through microstructural investigation, XRD and mechanical testing via cold draw load, and hardness testing for different reduction ratios are also studied for validation purposes. The results of this research show that 10-15 % reduction ratio yields the minimum springback. This can be used to help designing tools in the metal forming industry to minimize springback and improve the quality of the product.
Cold drawing,Seamless tubes,Springback,Optimization,Statistical Package for social sciences
http://jacm.scu.ac.ir/article_13433.html
http://jacm.scu.ac.ir/article_13433_15cdd8d8988ce949991db4f4310c1165.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Free Convection Flow of an Electrically-Conducting Micropolar Fluid between Parallel Porous Vertical Plates Using Differential Transform
286
298
EN
J.C
Umavathi
Department of Mathematics, Gulbarga University, Gulbarga Karnataka-585 106, India
jcuma11@yahoo.com
Ali J.
Chamkha
0000-0002-8335-3121
Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia | RAK Research and Innovation Center, American University of Ras Al Khaimah, United Arab Emirates
achamkha@pmu.edu.sa
M.
Shekar
Department of Mathematics, Gulbarga University, Gulbarga Karnataka-585 106, India
m.shekar@yahoo.com
10.22055/jacm.2018.24272.1180
In the present study, the effect of temperature-dependent heat sources on the fully developed free convection flow of an electrically conducting micropolar fluid between two parallel porous vertical plates in the presence of a strong cross magnetic field is analyzed. The micropolar fluid fills the space inside the porous plates when the rate of suction at one boundary is equal to the rate of injection at the other boundary. The coupled nonlinear governing differential equations are solved using the differential transform method (DTM). Moreover, the Runge-Kutta shooting method (RKSM), which is a numerical method, is used for the validity of DTM method and an excellent agreement is observed between the solutions of DTM and RKSM. Trusting this validity, the effects of Hartmann number, Reynolds number, micropolar parameter, and applied electric field load parameter are discussed on the velocity, microrotation velocity, and temperature. The skin friction, the couple stress, and Nusselt numbers at the plates are shown in graphs. It is observed that the Hartmann number and the micropolar parameter decreases the skin friction and the couple stress at both plates for suction and injection.
Free convection,Micropolar Fluid,Porous channel,Differential Transform Method
http://jacm.scu.ac.ir/article_13474.html
http://jacm.scu.ac.ir/article_13474_51ca7bc63d3eab9aade28e2059cd61df.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
An Analysis of Thermal-Bending Stresses in a Simply Supported Thin Elliptical Plate
299
309
EN
Vinod
Varghese
0000-0002-9660-7610
Department of Mathematics,
Smt. Sushilabai Rajkamalji Bharti Science College, Arni, Yavatmal, India.
vino7997@gmail.com
10.22055/jacm.2018.24352.1185
In this paper, a transient thermal stress investigation on a simply supported thin elliptical plate during sectional heating with time-dependent temperature supply is considered. The solution of heat conduction equation with corresponding initial and boundary conditions is obtained by employing an integral transform approach. The governing equation solution for the small deflection theory is obtained and utilized to preserve the intensities of thermal bending moments, involving the Mathieu and modified functions and its derivatives. The deflection results show an approximately good agreement with the previously given results. It is also demonstrated that the temperature field in a circular solution could be resulted in a particular case of the present mathematical solution. The obtained numerical results utilizing computational implements are precise enough for practical purposes.
Elliptical solid plate,Temperature distribution,Thermal stresses,Elliptical coordinate,Integral transform,Mathieu function
http://jacm.scu.ac.ir/article_13400.html
http://jacm.scu.ac.ir/article_13400_fe6c1cfdace19d93c773a6c4882acc46.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Clogged Impeller Diagnosis in the Centrifugal Pump Using the Vibration and Motor Current Analysis
310
317
EN
Mehran
Jahangiri
Department of Mechanical Engineering, Islamic Azad University, Address, Ahvaz, 61349-37333, Iran
jahangiri_bipc@yahoo.com
Seyed Alireza
Seyed Roknizadeh
Mechanical Engineering Department, Faculty of Engineering, Shahid Chamran University of Ahvaz, 61357-83151, Iran
s.roknizadeh@scu.ac.ir
10.22055/jacm.2018.24774.1211
The impeller-clogging phenomenon in centrifugal pumps is such a kind of the fault that leads to increase the vibration and reduce the performance of pumps. In addition, impeller-clogging could make some problems in the production process of factories. This research assigns to the detection of clogged impeller in a centrifugal pump using the vibration and motor current analysis. In this research, a test rig is set up and one of the impeller’s passageways is clogged by the sealing tape. The clogging detection, based on the vibration analysis, is done using the Fast Fourier Transform (FFT). The obtained results show that the dominant frequency in the impeller-clogging phenomenon is the rotational frequency of impeller (1xRPM). The measuring vibration values in three directions (horizontal, vertical, and axial) show that the clogged impeller has more effects on the axial vibration responses. Furthermore, in this case, the electrical current consumption of electromotor is reduced
Centrifugal pump,Clogging,Vibration analysis,Motor current analysis
http://jacm.scu.ac.ir/article_13564.html
http://jacm.scu.ac.ir/article_13564_8ff8390da31f1e9d0ad4671bd1931de5.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
A Study of Model Separation Flow Behavior at High Angles of Attack Aerodynamics
318
330
EN
Aritras
Roy
Department of Applied Mechanics, Engineering Faculty, IIT Madras, Chennai, India
aritrasroy73@gmail.com
Arnab Kumar
Mallik
Department of Applied Mechanics, IIT Madras, Chennai, India
arnabmallikju@gmail.com
Tushar Pratim
Sarma
Department of Applied Mechanics, IIT Madras, Chennai, India
tushar.juman@gmail.com
10.22055/jacm.2018.24339.1183
This paper analyzes the aerodynamic performance and flow separation characteristics of a rectangular wing for varying Reynolds numbers. The mechanism of separation and its effect on the rectangular wing were simulated in ANSYS FLUENT using K-ω SST turbulence model. A detailed analysis was performed to discuss aspects like the lift and drag force of the wing surface, surface pressure distribution around the wing surface, flow separation characteristics for different angles of attack, velocity profiles at different sections of the wing surface along the chord length, and the effect of wing tip vortices. The simulation results showed that by increasing the angles of attack, the separation point moves towards the leading edge and the onset of stalling is very much closer to the leading edge. Also, the experimental and numerical results indicated that NACA4415 airfoil had enhanced coefficient of lift to coefficient of drag ratio at the angles of attack (AoA) ranging between 4<sup>◦ </sup>and6<sup>◦</sup>,which are distinctively advantageous for the better performance of small-scale wind turbine rotors. The experimental and computational results were analyzed in the context of effective change in stalling characteristics at different Reynolds numbers.
Flow separation,Tip vortices,Gentle stall,Laminar separation bubble,Backflow
http://jacm.scu.ac.ir/article_13517.html
http://jacm.scu.ac.ir/article_13517_b42b31ec597756c04f5d3293b30c6754.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Evaluation of the Best New Cross-ply Laminated Plate Theories through the Axiomatic/Asymptotic Approach
331
351
EN
S.
Candiotti
Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología (UTEC), Medrano Silva 165, Barranco, Lima, Perú
scandiotti06@gmail.com
J.L.
MANTARI
Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología (UTEC), Medrano Silva 165, Barranco, Lima, Perú| Department of Mechanical Engineering, University of New Mexico, Albuquerque 87131, USA
jmantaril@uni.edu.pe
10.22055/jacm.2018.24851.1214
This paper presents Best Theory Diagrams (BTDs) constructed from various non-polynomial theories for the static analysis of thick and thin symmetric and asymmetric cross-ply laminated plates. The BTD is a curve that provides the minimum number of unknown variables necessary for a fixed error or vice versa. The plate theories that belong to the BTD have been obtained by means of the Axiomatic/Asymptotic Method (AAM). The different plate theories reported are implemented by using the Carrera Unified Formulation (CUF). Navier-type solutions have been obtained for the case of simply- supported plates loaded by a bisinuisoidal transverse pressure with different length-to-thickness ratios. The BTDs built from non-polynomials functions are compared with BTDs using Maclaurin expansion. The results suggest that the plate models obtained from the BTD using non-polynomial terms can improve the accuracy obtained from Maclaurin expansions for a given number of unknown variables of the displacement field.
Shear deformation,Best plate theory,Axiomatic–Asymptotic,Refined theories,Analytical Modeling
http://jacm.scu.ac.ir/article_13516.html
http://jacm.scu.ac.ir/article_13516_fe4d0fdd23a1ab7a6737d2e03b7d894b.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Heat Transfer in Hydro-Magnetic Nano-Fluid Flow between Non-Parallel Plates Using DTM
352
364
EN
Kezzar
Mohamed
Mechanical Engineering Department, University of 20 aout 1955, El Hadaiek Road, B. O. 26, 21000 Skikda, Algeria.
kezzar_m@yahoo.com
Sari
Mohamed Rafik
Laboratory of Industrial Mechanics, Badji Mokhtar University of Annaba, B. O. 12, 23000 Sidi Amar Annaba, Algeria
sari_rafik010@yahoo.fr
BOURENANE
Rabah
Laboratory of Industrial Mechanics, Badji Mokhtar University of Annaba, B. O. 12, 23000 Sidi Amar Annaba, Algeria
djasserboure@outlook.fr
Mohammad Mehdi
Rashidi
0000-0002-6309-8688
Department of Civil Engineering, University of Birmingham, Edgbaston Birmingham B15 2TT, United Kingdom
mm_rashidi@yahoo.com
HAIAHEM
Ammar
Laboratory of Industrial Mechanics, Badji Mokhtar University of Annaba, B. O. 12, 23000 Sidi Amar Annaba, Algeria
haiahem@yahoo.fr
10.22055/jacm.2018.24959.1221
This study presents a computational investigation on heat and flow behaviors between non parallel plates with the influence of a transverse magnetic field when the medium is filled with solid nanoparticles. The nonlinear governing equations are treated analytically via Differential Transform Method (DTM). Thereafter, obtained DTM results are validate with the help of numerical fourth order Runge-Kutta (RK4) solution. The main aim of this research work is to analyze the influence of varying physical parameters, in particular Reynolds number, nanofluid volume fraction, and Hartmann number. It was found that the presence of solid nanoparticles in a water base liquid has a notable effect on the heat transfer improvement within convergent-divergent channels. The comparison of DTM results with numerical RK4 solution also shows the validity of the analytical DTM technique. In fact, results demonstrate that the DTM data match perfectly with numerical ones and those available in literature.
Nanofluid Flow,Hydromagnetics,Convergent-Divergent Channel,DTM,Skin friction,Nusselt
http://jacm.scu.ac.ir/article_13563.html
http://jacm.scu.ac.ir/article_13563_97ca61b775c465aabbb429630c57148c.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
Damage Identification in a Multi-DOF System under Uncertainties Using Optimization Algorithms
365
374
EN
Ricardo F.
Ribeiro
Department of Mechanical Engineering, Universidade Federal do Rio de Janeiro, Rio de Janeiro , Brazil
ricardofernandes.rfr@poli.ufrj.br
Thiago G.
Ritto
Department of Mechanical Engineering, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
tritto@mecanica.ufrj.br
Haroldo F.
Campos Velho
Computing and Applied Mathematics Laboratory, Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil
haroldo.camposvelho@inpe.br
Jose
Herskovits
Department of Mechanical Engineering, Universidade Federal do Rio de Janeiro, Rio de Janeiro , Brazil
jose@optimize.ufrj.br
10.22055/jacm.2018.25033.1224
In this study, four optimization algorithms are applied to identify the damage in a multi-DOF dynamical system composed of masses, springs, and dampers. The damage is introduced artificially by choosing a lower value for the stiffness. The applied algorithms include Nelder-Mead Simplex, BFGS Quasi-Newton, interior point, and sequential quadratic programming - SQP. In addition, some different strategies to identify damage are applied. First, a deterministic analysis is performed to identify the damage; i.e, the values of the stiffnesses. Then, random forces are considered, and finally, the stiffness values are considered uncertain and the different strategies are compared.
Damage identification,Optimization,Uncertainties
http://jacm.scu.ac.ir/article_13593.html
http://jacm.scu.ac.ir/article_13593_5ce1103e2c0b50dd58c64a16876bb734.pdf
Shahid Chamran University of Ahvaz
Journal of Applied and Computational Mechanics
2383-4536
4
4
2018
10
01
A Review of Solar Energy Collectors: Models and Applications
375
401
EN
Younes
MENNI
Unite of Research on Materials and Renewable Energies - URMER - Department of Physics, Faculty of Sciences, Abou Bekr Belkaid University, BP 119-13000-Tlemcen, Algeria
menniyounes@gmail.com
Ahmed
AZZI
Unite of Research on Materials and Renewable Energies - URMER - Department of Physics, Faculty of Sciences, Abou Bekr Belkaid University, BP 119-13000-Tlemcen, Algeria | Department of Mechanical Engineering, Faculty of Technology, Abou Bekr Belkaid University, BP 230-13000-Tlemcen, Algeria
ahmed.azzi@gmail.com
Ali J.
Chamkha
0000-0002-8335-3121
Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia | RAK Research and Innovation Center, American University of Ras Al Khaimah, P.O. Box 10021, Ras Al Khaimah, United Arab Emirates
achamkha@pmu.edu.sa
10.22055/jacm.2018.25686.1286
A current study and discussion in detail about many solar energy collectors of various types, components, classifications and configurations, through the analysis of their performance, is our aim through this review paper. The effects of the geometrical parameters of the solar air collectors as well as the functioning parameters on heat transfer and fluid flow processes were also discussed in detail. The numerical, analytical, and experimental analyses on different models of flat plate solar air collectors with various thermal transfer enhancement strategies were shown in various stages, i.e., modelling, control, measurement, and visualization of airfield, determination of heat transfer, control of friction loss and pressure drop, and evaluation of the thermal performance by the measurement of the augmentation in the temperature of the working fluid at a given solar irradiance and under given flow rate. We concluded this review by identifying the various applications possible for the solar air collectors such as heating and cooling of houses, drying agricultural food materials, and water desalination process.
Solar energy collector,Flat absorber,Single-pass solar air collector,Double-pass solar air collector,Applications of air solar collectors
http://jacm.scu.ac.ir/article_13648.html
http://jacm.scu.ac.ir/article_13648_f07835fe22f43d84e35108140f248796.pdf