不同压缩速率下关节软骨力学性能的有限元模拟

doi:10.6040/j.issn.1671-9352.0.2015.143

山东大学学报（理学版） ›› 2016, Vol. 51 ›› Issue (3): 34-39.doi: 10.6040/j.issn.1671-9352.0.2015.143

不同压缩速率下关节软骨力学性能的有限元模拟

秦晓怡¹,高丽兰^1,2*,张慧³,张春秋¹,葛洪玉¹,刘志动¹

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. 天津大学化工学院, 天津 300072;3.天津出入境检验检疫局, 天津 300457

收稿日期:2015-04-07 出版日期:2016-03-20 发布日期:2016-04-07
通讯作者: 高丽兰(1978— ),女,博士,副教授,研究方向为生物力学.E-mail:gaolilan780921@163.com E-mail:qinxiaoyi2013@163.com
作者简介:秦晓怡(1990— ),男,硕士研究生,研究方向为生物力学.E-mail:qinxiaoyi2013@163.com
基金资助:
国家自然科学重点基金资助项目(11432016);国家自然科学基金资助项目(11572222,11172208)

Finite element modeling on mechanical property of articular cartilage with different compressive rates

QIN Xiao-yi¹, GAO Li-lan^1,2*, ZHANG Hui³, ZHANG Chun-qiu¹, GE Hong-yu¹, LIU Zhi-dong¹

1. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, Tianjin University of Technology, Tianjin 300384, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
3. Tianjin Entry-Exit Inspection and Quarantine Bureau, Tianjin, 300457, China

Received:2015-04-07 Online:2016-03-20 Published:2016-04-07

摘要/Abstract

摘要： 通过实验与模拟结合,探究不同压缩速率下关节软骨的微观力学性能。基于纤维增强多孔弹性模型,以蛋白多糖和间隙液体为两相、用非线性弹簧单元SPRINGA替代胶原纤维的性能建立有限元模型,并由实验数据确定有限元模型相关参数,运用ABAQUS有限元分析软件对关节软骨不同层区的率相关性能进行分析。恒定压缩速率下,关节软骨浅表层应变变化最大,深层最小,中间层介于两者之间;不同压缩速率下,压缩速率越大不同层区应变变化相应越大;加载初始时,液相主要在浅表层流动,随时间持续而向中间层及深层流动,液相最大流速渗出位置也相应下移。实验基础上,建立了一个合适的纤维增强多孔弹性模型。关节软骨不同层区力学性能具有率相关性,液相在关节软骨承载机理中起重要作用,承载所造成的软骨内部液相流动有助于软骨内部营养物质的交换流通。

关键词: 关节软骨, 压缩速率, ABAQUS, 力学性能, 不同层区

Abstract: To investigate the microscopic mechanical behavior of articular cartilage with different compressive rates by combining experiment and simulation. A finite element model was built based on fibril-reinforced porous elastic model, where proteoglycan and interstitial fluid were considered as two phase and non-linear spring elements SPRINGA played the part of collagenous fibers. The experimental data was used to determine the relevant parameters of the finite element model and the rate-dependent properties of different layers were analyzed by using ABAQUS. It is found that the compressive strain of superficial layer is the largest, the compressive strain of deep layer is the smallest and the compressive strain of middle layer is between the superficial and deep zones under constant loading rate. The compressive strains of different layers increase with increase of loading rate. At the initial stage, fluid flows out mainly in the superficial zone, while fluid gradually flows into middle and deep layers with the increasing time and the position of maximum flow moves downward. The fibril reinforced poroelastic model based on experiment is created successfully. The mechanical properties of different layers in articular cartilage are rate-dependent. The liquid phase plays a key role in bearing load and the flow of liquid in cartilage under load leads to the exchange of nutrients in cartilage.

Key words: compressive rate, mechanical property, ABAQUS, articular cartilage, different layers

中图分类号:

Q819

秦晓怡,高丽兰,张慧,张春秋,葛洪玉,刘志动. 不同压缩速率下关节软骨力学性能的有限元模拟[J]. 山东大学学报（理学版）, 2016, 51(3): 34-39.

QIN Xiao-yi, GAO Li-lan, ZHANG Hui, ZHANG Chun-qiu, GE Hong-yu, LIU Zhi-dong. Finite element modeling on mechanical property of articular cartilage with different compressive rates[J]. JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE), 2016, 51(3): 34-39.

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不同压缩速率下关节软骨力学性能的有限元模拟

Finite element modeling on mechanical property of articular cartilage with different compressive rates

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