关节软骨内部损伤演化力学机制的数值分析  

Numerical analysis of the mechanical mechanism of the internal damage of articular cartilage

作　　者：赵忠海 门玉涛[1,2] 龚虎臣 张春秋[1,2] ZHAO Zhonghai;MEN Yutao;GONG Huchen;ZHANG Chunqiu(Tianjin Key Laboratory for Advanced Mechatronical System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机电工程国家级实验教学示范中心,天津300384

出　　处：《天津理工大学学报》2021年第5期54-60,共7页Journal of Tianjin University of Technology

基　　金：天津市自然科学基金(18JCYBJC95200);国家自然科学基金(12072235)。

摘　　要：从关节软骨的细观结构出发,建立纤维增强多孔黏弹性关节软骨二维细观模型,模型考虑了纤维和基质随软骨深度变化的力学参数,通过数值计算研究了由关节软骨内部纤维损伤引起基质损伤演化的力学规律。结果显示,在滚压载荷作用下软骨的中层承受应力最大,最容易在中层开始出现损伤演化,随着施加载荷的次数不断增加,损伤首先从中层纤维开始,不断往软骨表层延伸大体呈大"V"字形分布。此研究结果可以阐述软骨损伤演化的力学机制,为软骨疾病的防治提供参考数据。In this paper,starting from the microstructure of articular cartilage,a two-dimensional microscopic model of fiber-reinforced porous viscoelastic articular cartilage is established.The model considers the mechanical parameters of fiber and matrix that change with the depth of cartilage,and numerically calculates the mechanical law of matrix damage evolution caused by the internal fiber damage of articular cartilage.The results show that the middle layer of cartilage bears the greatest stress under the action of rolling load,and the damage evolution is most likely to occur in the middle layer.As the number of loads increases,the damage first starts from the middle layer fibers and continues to extend to the cartilage surface layer in a large V shape distribution.The results of this study can explain the mechanical mechanism of cartilage damage evolution and provide reference data for the prevention and treatment of cartilage diseases.

关 键 词：关节软骨 纤维增强 细观模型 损伤演化 数值计算 

分 类 号：R318.01[医药卫生—生物医学工程]