Abstract
A common problem with artificial hip replacements is increased wear of the material in contact. Materials that are in contact result in contact pressure caused by the patient's daily activities so that it triggers wear. This study adopts a finite element method (FEM) to predict wear of the artificial hip joint, by studying the behavior of a hip joint prosthesis that has clearance under a certain load. The aim of this study was to observe contact as a function of clearance and body weight. The modeling uses metal as femoral head and polycarbonate urethane (PCU) material as the acetabular cup. Contact modeling as a hard material in contact with a deformable material. Four variations of clearance (0.001, 0.005, 0.01, 0.016) and three variations of body weight (500N, 700N, and 1000N) were used in this study. The simulation results show that the lower the distance and weight, the lower the contact pressure.
Highlights
Not a few people in this world who experience fractures in the hip joint due to accidents or calcification in the elderly, where one of the treatments is replacement with artificial hip joints
The results show that the initial location of the crack and the fracture path in the artificially cemented hip joint can be predicted using the XFEM
Simulations contact mechanic of metal on polycarbonate urethane (PCU) material for artificial hip joint implant were performed by finite element method (FEM)
Summary
Not a few people in this world who experience fractures in the hip joint due to accidents or calcification in the elderly, where one of the treatments is replacement with artificial hip joints. Many factors influence the success of a human hip replacement, including the surgical technique used, torso position and alignment, intramedullary fixation, implant design, body weight and others [1]. Wear particles in the bearing are a major contributing factor in prolonging the life of the implant.[2]. Joint function is affected by the distribution of contact pressure in natural and artificial joints. As has been shown by several studies [3][4][5], the clearance between the two contact surfaces has an important role in the process of implant wear and friction. It is very important to continue research on wear for the development of new bearing pairs and design evaluation. Conducting experimental studies in this way is quite costly and time consuming in its implementation, it is very important to do a preclinical
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