Numerical Analysis of Artificial Hip Joints for Standing and Sit-to-Stand Positions

Abstract

This paper deals with the analysis of the artificial hip joint implant (AHI) for the activity like sit-to-stand and the standing position. The simulation was completed in one of the simulation software packages like ABAQUS. For simulation, first step is to create a CAD model, define material properties and then create mesh of the complete model, and apply boundary and load conditions. The artificial hip joint consists of the femoral head which is spherical in shape, backing cup which is of cup shape and acetabular cup which is situated between femoral head and backing cup. The target of the simulation was to perform the analysis and to compute the parameters such as maximum von Mises stress, deflection, sliding distance and contact stress. The contact between acetabular cup and the outer part of femoral head; and the contact between backing cup and the outer part of acetabular cup are very important to study. The contact stress was computed for activities like sit-to-stand and standing in these contacts. The study of different weight patients was done by applying different actual loads corresponding to body weights. After analysis, the comparison of results was done. This can help in evaluating the effect of the increase in body weight on contact stress, total deformation, von Mises stress and sliding distance.