TY - JOUR ID - 17338 TI - Reducing the Wear of the UHMWPE Used in the Total Hip ‎Replacement after Low-Pressure Plasma Treatment JO - Journal of Applied and Computational Mechanics JA - JACM LA - en SN - AU - Pakhaliuk, Vladimir Ivanovich AU - Vasilets, Victor Nikolaevich AU - Poliakov, Aleksandr Mikhailovich AU - Torkhov, Nikolay Anatolevich AD - Polytechnic Department, Sevastopol State University, Sevastopol, 299053, Russia‎ AD - N.N. Semenov Federal Research Center of Chemical Physics (Branch), Moscow region, 142432, Russia‎ Y1 - 2022 PY - 2022 VL - 8 IS - 3 SP - 1035 EP - 1042 KW - total hip replacement (THR) KW - low-pressure plasma KW - UHMWPE KW - Simulation KW - wear‎ DO - 10.22055/jacm.2022.39555.3432 N2 - This paper discusses the problem of evaluating the microhardness gradient effect on surface wear of an ultra-high molecular weight polyethylene (UHMWPE) films treated with low-pressure plasma. Its solution was first obtained on the basis of the well-known Archard's wear law, modified taking into account the use of approximating dependences of negative depth gradients of surfaces microhardness, calculated on the basis of experimental data obtained by the nanoindentation method for samples with different plasma processing times (from 3 to 12 minutes). The wear evaluation was carried out in the ANSYS and MATLAB software in accordance with the requirements of ISO 14242-1 using the method of numerical simulation developed by authors. The simulation results show that such an integral parameter as cumulative volume wear is significantly lower for specimens treated with low-pressure plasma as compared to untreated ones. It has been found that both linear and cumulative volume wear decrease with an increase in the plasma processing time of the sample. The largest reduction (4 times compared to untreated) has been obtained for samples with a hardness gradient obtained by plasma surface treatment for 12 minutes. This time can be considered the maximum possible for processing UHMWPE with low-pressure plasma, since further increase in this time enhances the sample surface roughness and, consequently, the coefficient of friction. The use of low-pressure plasma treated UHMWPE films in THR will significantly reduce their wear and the likelihood of osteolysis, and thus increase the THR lifespan. UR - https://jacm.scu.ac.ir/article_17338.html L1 - https://jacm.scu.ac.ir/article_17338_964168ff17d022f92c7f00a827d1c5c7.pdf ER -