Modeling and validation of the large deformation inelastic response of amorphous polymers over a wide range of temperatures and strain rates
Modeling and validation of the large deformation inelastic response of amorphous polymers over a wide range of temperatures and strain rates
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DOI：
10.1016/j.ijsolstr.2007.05.018
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发表时间：
2007-12-01
影响因子：
3.6
通讯作者：
Makradi, A.
中科院分区：
文献类型：
--
作者：
Richeton, J.;Ahzi, S.;Makradi, A.
一个强大的物理一致的三维本构模型的开发来描述有限的无定形聚合物的机械响应在很宽的温度和应变率范围内，包括橡胶区域和冲击加载速率。这个热机械模型是基于一个弹性-粘塑性流变学的方法，其中的温度，应变速率和静水压力的影响占。分子内，以及分子间，大的弹性-非弹性行为下的相互作用被认为是变形和硬化的机制。对于广泛的温度和应变率，我们的模拟结果聚（甲基丙烯酸甲酯）（PMMA）和聚碳酸酯（PC）是在很好的协议与实验观察。(C)2007爱思唯尔有限公司保留所有权利。
A robust physically consistent three-dimensional constitutive model is developed to describe the finite mechanical response of amorphous polymers over a wide range of temperatures and strain rates, including the rubbery region and for impact loading rates. This thermomechanical model is based on an elastic-viscoplastic rheological approach, wherein the effects of temperature, strain rate, and hydrostatic pressure are accounted for. Intramolecular, as well as intermolecular, interactions under large elastic-inelastic behavior are considered for the mechanisms of deformation and hardening. For a wide range of temperatures and strain rates, our simulated results for poly(methyl methacrylate) (PMMA) and polycarbonate (PC) are in good agreement with experimental observations. (C) 2007 Elsevier Ltd. All rights reserved.