An anisotropic pseudo-elastic approach for modelling Mullins effect in fibrous biological materials
An anisotropic pseudo-elastic approach for modelling Mullins effect in fibrous biological materials
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DOI：
10.1016/j.mechrescom.2009.05.006
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发表时间：
2009-10-01
影响因子：
2.4
通讯作者：
Doblare, Manuel
中科院分区：
文献类型：
--
作者：
Pena, Estefania;Doblare, Manuel
本文提出了一个全三维有限应变公式与一个简单的伪弹性各向异性模型再现软化行为，出现在软生物组织（Mullins效应）。这是Ogden和罗克斯堡的伪弹性模型的各向异性扩展，该模型较早提出来描述橡胶在大变形下的软化行为。该模型利用内部变量的概念，提供了一个非常一般的描述涉及不可逆效应的材料。几种软组织的单轴试验的数值模拟被用来显示在现实情况下的模型的性能。计算结果表明，所提出的模型能够足够准确地描述真实的生物软组织的软化行为。(C)2009爱思唯尔有限公司保留所有权利。
This paper presents a fully three-dimensional finite-strain formulation with a simple pseudo-elastic anisotropic model to reproduce the softening behavior that appears in soft biological fibred tissues (Mullins effect). This is an anisotropic extension of the pseudoelastic model of Ogden and Roxburgh which was earlier proposed to describe the softening behavior of rubbers under large deformation. The model makes use of the concept of internal variables which provides a very general description of materials involving irreversible effects. Numerical simulations of uniaxial tests of several soft tissues are used to show the performance of the model in realistic situations. The computed results indicate that the proposed model is able to describe with enough accuracy the softening behavior of real soft biological tissues. (C) 2009 Elsevier Ltd. All rights reserved.