An uncoupled directional damage model for fibred biological soft tissues.: Formulation and computational aspects
An uncoupled directional damage model for fibred biological soft tissues.: Formulation and computational aspects
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DOI：
10.1002/nme.1825
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发表时间：
2007-03-05
影响因子：
2.9
通讯作者：
Doblare, M.
中科院分区：
文献类型：
--
作者：
Calvo, B.;Pena, E.;Doblare, M.
在本文中，我们提出了一个全三维有限应变损伤模型的纤维软组织。用连续损伤力学来描述软组织在大变形下的软化行为。使用内部变量的概念，提供了一个非常一般的描述涉及不可逆效应的材料的结构模型制定。我们认为与损伤相关的内部变量对应于基质和纤维的单独贡献。为了清楚地显示本构模型的性能，我们提出了人体内侧副韧带和冠状动脉的行为的三维模拟。结果表明，该模型能够捕捉到纤维软组织中观察到的典型应力-应变行为，似乎证实了所提出的配方的合理性。版权所有（c）2006约翰威利父子有限公司。
In this paper we present a fully three-dimensional finite-strain damage model for fibrous soft tissue. Continuum damage mechanics is used to describe the softening behaviour of soft tissues under large deformation. The structural model is formulated using the concept of internal variables that provides a very general description of materials involving irreversible effects. We considered the internal variables associated to damage to correspond to separated contributions of the matrix and fibres. In order to show clearly the performance of the constitutive model, we present 3D simulations of the behaviour of the human medial collateral ligament and of a coronary artery. Results show that the model is able to capture the typical stress-strain behaviour observed in fibrous soft tissues and seems to confirm the soundness of the proposed formulation. Copyright (c) 2006 John Wiley & Sons, Ltd.