Wu James Shih-Shyn, Hung Jui-Pin, Shu Chi-Shiang, Chen Jian-Horng
Institute of Mechanical Engineering, National Chung-Hsing University, 250, Kuo-Kuang Road, Taichung, Taiwan 402, Taiwan, ROC.
Comput Methods Programs Biomed. 2003 Jan;70(1):81-91. doi: 10.1016/s0169-2607(01)00199-7.
Computer algorithms are proposed for the estimation of wear appearing in artificial hip joints using finite element analysis based on the modified Archard's wear law, contact features and an analogue wear process. A pin-on-disk plate experiment is reconstructed to assess the efficiency and validity of the algorithms proposed here. Through the successful verification of wear depth and volume loss of the pin-on-disk plate as well as the artificial hip joint, the current algorithms provide significant agreement with experiments, clinical measurements and numerical calculations and are shown to be both valid and feasible. Further investigation into the effect of femoral heads with various sizes suggests that the larger femoral head may induce larger wear volume but gives a smaller wear depth and that wear depth and volume loss are apparently nonlinearly related to the femoral head diameter. It is shown that the current algorithms are useful and helpful in understanding wear behavior for alternative or new designs of artificial hip joints and even for other analogous structures.
基于修正的阿查德磨损定律、接触特征和模拟磨损过程，利用有限元分析，提出了用于估计人工髋关节磨损情况的计算机算法。重建了销盘实验以评估本文提出的算法的效率和有效性。通过成功验证销盘以及人工髋关节的磨损深度和体积损失，当前算法与实验、临床测量和数值计算结果高度吻合，表明其有效且可行。对不同尺寸股骨头影响的进一步研究表明，较大的股骨头可能导致更大的磨损体积，但磨损深度较小，且磨损深度和体积损失与股骨头直径明显呈非线性关系。结果表明，当前算法有助于理解人工髋关节替代或新设计以及其他类似结构的磨损行为。
