A finite element implementation for biphasic contact of hydrated porous media under finite deformation and sliding
A finite element implementation for biphasic contact of hydrated porous media under finite deformation and sliding
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DOI：
10.1177/0954411914522782
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发表时间：
2014-03-01
期刊：
影响因子：
1.8
通讯作者：
Spilker, Robert L.
中科院分区：
文献类型：
--
作者：
Guo, Hongqiang;Shah, Mitul;Spilker, Robert L.
软组织双相接触的研究是了解人类关节生物力学行为的基础。然而，迄今为止，只有少数双相有限元接触分析的三维生理几何形状下的有限变形已经开发。本文的目的是开发一个超弹性两相接触实现有限变形和滑动问题。采用增广拉格朗日方法来保证接触界面上的接触力和流体压力的连续性。有限元实现基于通用软件COMSOL Multiphysics。实施的准确性进行了验证，使用示例问题，其中的解决方案是可供选择的分析。该实现被证明是强大的，能够处理有限的变形和滑动。
The study of biphasic soft tissue contact is fundamental to understand the biomechanical behavior of human diarthrodial joints. However, to date, only few biphasic finite element contact analyses for three-dimensional physiological geometries under finite deformation have been developed. The objective of this article is to develop a hyperelastic biphasic contact implementation for finite deformation and sliding problem. An augmented Lagrangian method was used to enforce the continuity of contact traction and fluid pressure across the contact interface. The finite element implementation was based on a general purpose software, COMSOL Multiphysics. The accuracy of the implementation is verified using example problems, for which solutions are available by alternative analyses. The implementation was proven to be robust and able to handle finite deformation and sliding.