Finite element algorithm for frictionless contact of porous permeable media under finite deformation and sliding.

Finite element algorithm for frictionless contact of porous permeable media under finite deformation and sliding.
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DOI:
10.1115/1.4001034
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发表时间:
2010-06
期刊:
Journal of biomechanical engineering
影响因子:
--
通讯作者:
Weiss JA
Weiss JA
中科院分区:
其他
文献类型:
--
作者:
Ateshian GA;Maas S;Weiss JA

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本研究制定并实施了固-液(两相)混合物的有限元接触算法,容纳有限变形和滑动。有限元源代码向公众开放。该算法使用了一种增广拉格朗日正则化的惩罚方法,以加强接触牵引力和接触界面上的流体通量的法向分量的连续性。该配方解决了在接触界面外自动执行自由排放条件的需要。该配方解决了在接触界面外自动执行自由排放条件的需要。使用接触问题的精确解得到替代分析的准确性进行了验证。还提供了说明与生物力学应用(如关节接触)相关的配置下的大变形和滑动的插图。这项研究解决了一个重要的计算需要在生物力学的多孔渗透性软组织。将源代码置于公共领域为生物力学社区提供了有用的资源。
This study formulates and implements a finite element contact algorithm for solid-fluid (biphasic) mixtures, accommodating both finite deformation and sliding. The finite element source code is made available to the general public. The algorithm uses a penalty method regularized with an augmented Lagrangian method to enforce the continuity of contact traction and normal component of fluid flux across the contact interface. The formulation addresses the need to automatically enforce free-draining conditions outside of the contact interface. The formulation addresses the need to automatically enforce free-draining conditions outside of the contact interface. The accuracy of the implementation is verified using contact problems for which exact solutions are obtained by alternative analyses. Illustrations are also provided that demonstrate large deformations and sliding under configurations relevant to biomechanical applications such as articular contact. This study addresses an important computational need in the biomechanics of porous-permeable soft tissues. Placing the source code in the public domain provides a useful resource to the biomechanics community.
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