Modeling of anisotropic softening phenomena: Application to soft biological tissues
Modeling of anisotropic softening phenomena: Application to soft biological tissues
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DOI：
10.1016/j.ijplas.2008.06.001
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发表时间：
2009-05-01
影响因子：
9.8
通讯作者：
Itskov, Mikhail
中科院分区：
文献类型：
--
作者：
Ehret, Alexander E.;Itskov, Mikhail
本文提出了一个描述各向异性材料软化现象的耗散模型。该模型是基于广义多凸各向异性应变能函数表示的一系列。各向异性软化被认为是由内部变量的各向异性性能的材料的演变。相应地，制定的演化方程和各向异性条件软化的发病定义。在数值算例中，将该模型应用于模拟生物软组织在循环加载实验中的预处理行为。结果表明，预处理的一般特点，不同的上限载荷捕获，包括滞后和残余变形。马林斯效应的模型作为一个特殊的情况下获得的，并显示出非常好的协议与小鼠皮肤上的实验数据。(C)2008爱思唯尔有限公司版权所有。
A thermodynamically consistent dissipative model is proposed to describe softening phenomena in anisotropic materials. The model is based on a generalized polyconvex anisotropic strain energy function represented by a series. Anisotropic softening is considered by evolution of internal variables governing the anisotropic properties of the material. Accordingly, evolution equations are formulated and anisotropic conditions for the onset of softening are defined. In numerical examples, the model is applied to simulate the preconditioning behavior of soft biological tissues subjected to cyclic loading experiments. The results suggest that the general characteristics of preconditioning with different upper load limits are well captured including hysteresis and residual deformations. A model for the Mullins effect is obtained as a special case and shows very good agreement with experimental data on mouse skin. (C) 2008 Elsevier Ltd. All rights reserved.