Multilevel finite element analysis on the biological tribology damage of water on bone tissue [in Chinese]

Ze-dong, He; Jing, Zhao; Liang-yu, Chen; Ke, Li; Jie, Weng

Affiliations

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

Abstract and keywords

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

Keywords: Bone and Bones; Water; Finite Element Analysis; Tissue Engineering

Links

DOI: 10.3969/j.issn.2095-4344.2017.07.011

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