扭动摩擦条件下软骨损伤行为研究  

Research on Torsional Wear Characterization of Joint Articular Cartilage

作　　者：蔡振兵[1] 杨莎[1] 高姗姗[2] 于海洋[2] 朱旻昊[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,摩擦学研究所,四川成都610031 [2]四川大学口腔疾病研究国家重点实验室,四川成都610041

出　　处：《四川大学学报（工程科学版）》2011年第3期209-213,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(81070867);教育部博士点基金资助项目(20100184120002);中央高校基本科研业务费专项资金资助项目(SWJTU09CX020)

摘　　要：使用新型扭动摩擦磨损试验机,在林格溶液（Ringer’s solution）条件下,对牛髋关节软骨/Φ28 mm Al2O3摩擦副进行了扭动角位移幅值为0.5°~10°和法向载荷为5~50 N的扭动摩擦磨损试验。在摩擦动力学行为分析的基础上,使用扫描电镜（SEM）、苏木素-伊红（HE）染色法对磨痕进行了观察,分析了软骨的磨损机理。结果表明,牛髋关节软骨在扭动磨擦条件下存在2种T-θ曲线,即椭圆和平行四边形,分别对应扭动摩擦的部分滑移和完全滑移状态。在扭动摩擦处于部分滑移状态时,牛髋关节软骨表面损伤轻微,主要损伤机理为表面褶皱。处于滑移状态时,沿半径方向,磨痕可依次分为粘着区、褶皱区、微裂纹区和剥落区,其主要损伤机制为表面裂纹与剥落。On a new torsional wear tester,the torsional wear tests of bovine hip joint articular cartilage flat against Al3O2 femoral heads（with diameter of 28 mm） were carried out with various angular displacement amplitudes ranging from 0.5° to 5° and imposed loads ranging from 5 to 50 N.Based on the analysis of the frictional kinetics of torsional fretting,the wear were observed by electron microscope（SEM） and Hematoxylin-Eosin（HE） stain,and the damage characteristics of joint articular cartilage also were discussed.The results indicated that two kinds of T-θ curves（i.e.parallelogram and elliptical curves） were observed during the process of torsional wear.Parallelogram mainly occurred at slip status（SS） and elliptical loops appeared at partial slip status（PSS）.The damage of bovine hip joint articular cartilage under torsional fretting PSS was very slight and the folding was the main damage.Under SS,along the radial direction,the wear scar could be divided to three zones,i.e.the adhesive zone,folding and micro-crack zone,and delamination zone,respectively.The wear mechanism performed as delamination and micro-cracking.

关 键 词：摩擦磨损 扭动磨损 关节软骨 磨损机制 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TH117.3[金属学及工艺—金属学]