用于髋关节植入物的生物润滑条件下氧化锆增韧氧化铝对氧化铝的体外摩擦学研究及子模型有限元技术分析磨损

In-vitro tribological study and submodeling finite element technique in analyzing wear of zirconia toughened alumina against alumina with bio-lubricants for hip implants.

机构信息

Department of Mechatronics Engineering, Kongu Engineering College, Erode, TamilNadu, 638052, India.

出版信息

Med Eng Phys. 2021 Dec;98:83-90. doi: 10.1016/j.medengphy.2021.11.001. Epub 2021 Nov 4.

DOI:10.1016/j.medengphy.2021.11.001

Abstract

Tribological study of zirconia toughened alumina against alumina is investigated using ball-on-disk tribometer with different bio-lubricants. Friction and wear coefficients are estimated for these bio-lubricants under four different loading conditions which are equivalent to regular and risky human gait activities. Experiments are carried out for a total sliding distance of 10 km with each bio-lubricant to estimate its friction and wear coefficients. Using submodeling finite element approach, cumulative linear and volumetric wear is estimated with the help of contact pressure. The sesame oil bio-lubricant showed better wear coefficient for risky gait activities and Ringer's solution exhibited minimum wear coefficient for normal walking gait activity. Overall minimum cumulative linear and volumetric wear for 2 million cycles was obtained for Ringer's solution.

摘要

采用球盘式摩擦磨损试验机，使用不同的生物润滑剂，对氧化锆增韧氧化铝与氧化铝的摩擦学性能进行了研究。在相当于常规和危险人类步态活动的四种不同载荷条件下，估算了这些生物润滑剂的摩擦系数和磨损系数。在每种生物润滑剂下，实验总滑动距离为 10km，以估算其摩擦系数和磨损系数。使用子模型有限元方法，借助接触压力估算了累计线性和体积磨损。芝麻油生物润滑剂在危险步态活动中表现出更好的磨损系数，而林格氏溶液在正常步行步态活动中表现出最小的磨损系数。在 200 万次循环中，林格氏溶液的总累计线性和体积磨损最小。