Cobalt chromium molybdenum alloy and highly cross-linked polyethylene are selected as the counterpairs in this study to carry out friction and wear testing over different ellipse motion paths to explore the influence of ellipse motion path on friction and wear of prosthesis materials. Here, the analytical methods for the periodic friction coefficient and special point wear are proposed to investigate the relationship between motion paths and tribological properties. The damage mechanism model of high cross-linked polyethyleneunder ellipse motion paths was established, which revealed the connection among material composition, motion paths and friction and wear mechanism. The results show that the friction coefficient and wear morphology are directly affected by changes in motion paths. The friction coefficient decreases with increasing aspect ratios, and the wear profile depth increases with increasing aspect ratios. The spatially resolved friction coefficient curve distinctly exhibits periodic “W”-type variation in elliptical motion paths. The friction coefficient shows maximum values at the long-axis endpoints and minimum values at the short-axis endpoints. There are different wear morphologies in different characteristic areas over the elliptical wear paths. The wear profile depth and width at the long-axis endpoints are larger than those at the short-axis endpoints, and the wear morphology is also more serious.

选择钴铬钼合金和高度交联的聚乙烯作为对，以对不同的椭圆运动路径进行摩擦和磨损测试，以探讨椭圆运动路径对假体材料摩擦和磨损的影响。在此，提出了周期性摩擦系数和特殊点磨损的分析方法，以研究运动路径与摩擦学特性之间的关系。建立了高交联聚乙烯在椭圆运动路径下的损伤机理模型，揭示了材料成分，运动路径与摩擦磨损机理之间的联系。结果表明，运动路径的变化直接影响摩擦系数和磨损形态。摩擦系数随长径比的增加而减小，而磨损轮廓深度随长径比的增加而增加。在空间上解析的摩擦系数曲线在椭圆运动路径中明显表现出周期性的“ W”型变化。摩擦系数在长轴端点处显示最大值，在短轴端点处显示最小值。在椭圆形磨损路径上的不同特征区域中存在不同的磨损形态。长轴端点处的磨损轮廓深度和宽度大于短轴端点处的轮廓，并且磨损形态也更加严重。摩擦系数在长轴端点处显示最大值，在短轴端点处显示最小值。在椭圆形磨损路径上的不同特征区域中存在不同的磨损形态。长轴端点处的磨损轮廓深度和宽度大于短轴端点处的轮廓，并且磨损形态也更加严重。摩擦系数在长轴端点处显示最大值，在短轴端点处显示最小值。在椭圆形磨损路径上的不同特征区域中存在不同的磨损形态。长轴端点处的磨损轮廓深度和宽度大于短轴端点处的轮廓，并且磨损形态也更加严重。