中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (7): 1041-1045.doi: 10.3969/j.issn.2095-4344.2017.07.011

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

水对骨组织生物摩擦学损伤多尺度的有限元分析

何泽栋1,赵 婧1,陈亮宇1,李 科1,翁 杰2   

  1. 1西南交通大学机械工程学院,四川省成都市 610031;2西南交通大学材料先进技术教育部重点实验室,四川省成都市 610031
  • 修回日期:2016-11-08 出版日期:2017-03-08 发布日期:2017-04-11
  • 通讯作者: 赵婧,博士,副教授,西南交通大学机械工程学院,四川省成都市 610031
  • 作者简介:何泽栋,男,1992年生,四川省南充市人,汉族,硕士,主要从事生物摩擦学和有限元计算方面的研究。
  • 基金资助:

    国家自然科学基金资助项目(51205327);高等学校博士学科点专项科研基金资助项目(20120184120019);中央高校基本科研业务费专项资金资助项目(2682014SWJTU11CX020)

Multilevel finite element analysis on the biological tribology damage of water on bone tissue  

He Ze-dong1, Zhao Jing1, Chen Liang-yu1, Li Ke1, Weng Jie2   

  1. 1School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China; 2Key Laboratory of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China
  • Revised:2016-11-08 Online:2017-03-08 Published:2017-04-11
  • Contact: Zhao Jing, M.D., Associate professor, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China
  • About author:He Ze-dong, Master, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 51205327; the Special Research Foundation of Doctoral Course in Colleges and Universities, No. 20120184120019; the Special Fund for Basic Scientific Research of Central University, No. 2682014SWJTU11CX020

摘要:

文章快速阅读:

 

文题释义:
骨单位:是指在内、外环骨板之间的纵行圆筒状结构,又称哈佛氏系统,其中轴是一条纵行的管道,称为中央管或哈佛氏管,中央管的周围是10-20层同心圆排列的骨板,称为哈弗氏骨板,骨细胞位于骨板内或骨板间。骨单位数量较多,是构成长骨骨干的基本结构单位。
纳米压痕:压入载荷的测量和控制是通过应变仪来实现,整个压入过程由计算机自动控制,可在线测量载荷与相应的位移,并建立两者之间的相应关系(即P-h曲线)。在纳米压痕的应用中,弹性模量和硬度值是最常用的实验数据,通过卸载曲线的斜率得到弹性模量E,硬度值H 则可由最大加载载荷和残余变形面积求出。
 
摘要
背景:骨组织是人体含水量较低的组织,很多研究报道了力学性能与水含量的关系,但水含量对骨组织生物摩擦学行为的研究却鲜见报道,且多为实验研究。
目的:建立多尺度数值模型,探索水分对骨组织摩擦学行为的影响和损伤机制。
方法:骨组织干燥处理后进行纳米压痕、往复滑动摩擦和冲击磨损实验,并建立以球-平面接触的多尺度有限元模型。

结果与结论:干燥降低了骨组织黏弹性,在外载下表现出不同的损伤机制,摩擦学性能明显下降。数值分析表明:高载荷条件下,哈佛氏管、同心骨板及间骨板均存在高应力状态,易引发裂纹萌生和磨损剥落。在细观尺度下,干燥削弱了应力的吸收和打断作用,有利于孔隙裂纹延伸。在微观尺度下,骨小管和骨陷窝结构的高应力梯度是组织损伤的重要原因。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID: 0000-0002-8703-7062(赵婧)

关键词: 骨科植入物, 数字化骨科, 骨组织, 水, 有限元分析, 损伤, 国家自然科学基金

Abstract:

BACKGROUND: Many studies reported the relationship of the mechanical properties and water content about bone tissue, which is one of organizations containing the lowest water content on human body. Researches on effect of water on biological tribology behavior of bone tissue have been rarely reported and are the experimental study generally.

OBJECTIVE: To explore the influence and the damage mechanism of water on biological tribology behavior of bone tissue, by comparing multiscale numerical model established with the experiment.

 

METHODS: Dehydration of the bone tissue was studied by nanoindentation test and both reciprocating sliding and impact wear tests. A multi-scale finite element model was constructed under a flat-on-ball configuration.
RESULTS AND CONCLUSION: The viscoelasticity and the tribological properties of bone tissue significantly decreased as well as the different wear mechanisms under applied loading after drying. The analytical results indicated that there were high stress condition, which incurred the micro-crack initiation and the appearance of peeling and wear, around the Haversian canal, circumferential lamellas and the interstitial tissues. Meso-scale: dehydration weakened the function of absorption and interruption of stress, which facilitated crack extension in pore. Micro-scale: the high stress gradient of structure of canaliculi and lacunae is an important cause of tissue damage. 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Bone and Bones, Water, Finite Element Analysis, Tissue Engineering

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