Abu Qudeiri Jaber E, Abdudeen Asarudheen, Sahadevan Mini Rema, Padmanabhan M Anantha
Mechanical and Aerospace Engineering Department, College of Engineering, United Arab Emirates University, Al Ain, 15551, United Arab Emirates.
Mechanical Engineering Department, College of Engineering Trivandrum, Thiruvananthapuram, India.
Heliyon. 2024 Feb 14;10(4):e26151. doi: 10.1016/j.heliyon.2024.e26151. eCollection 2024 Feb 29.
Modern hip arthroplasty still faces the issue of wear in the articulating surface and wear induced debris. Thus, the design of hip implant is highly important for its longevity. Experimental demonstration of wear in hip implant involves both time and cost and, in this regard, finite element analysis acts as a suitable alternative. In this work, the wear characteristics of design modified and surface modified femoral head is studied. Femoral head is assumed to be made of TiAlV and liner material is taken as UHMWPE. Design of the femoral head is modified by providing grooves on the femoral head as well as by providing an additional liner on the femoral head surface. Surface of the femoral head is modified with square or circular dimples. This work involves the development of femoral head model and its simulation using ANSYS under static load condition to get the contact pressure and sliding distance. Modified Archard's wear equation uses the contact stress and sliding distance to determine the wear volume produced per year and the obtained results are compared with that in the available literature. The study shows that the wear rate reduced up to 10% by surface modification and 3% by design modifications.
现代髋关节置换术仍然面临关节表面磨损以及磨损产生碎屑的问题。因此，髋关节植入物的设计对其使用寿命至关重要。髋关节植入物磨损的实验证明既耗时又费钱，在这方面，有限元分析是一种合适的替代方法。在这项工作中，研究了设计改进型和表面改性型股骨头的磨损特性。假设股骨头由钛铝钒制成，衬垫材料采用超高分子量聚乙烯。通过在股骨头表面设置凹槽以及在股骨头表面增加一个衬垫来改进股骨头的设计。股骨头表面用方形或圆形凹坑进行改性。这项工作包括建立股骨头模型，并在静态载荷条件下使用ANSYS对其进行模拟，以获得接触压力和滑动距离。修正的阿查德磨损方程利用接触应力和滑动距离来确定每年产生的磨损量，并将所得结果与现有文献中的结果进行比较。研究表明，通过表面改性磨损率降低了10%，通过设计改进磨损率降低了3%。
