A consistency elasto-viscoplastic damage model for progressive failure analysis of composite laminates subjected to various strain rate loadings
A consistency elasto-viscoplastic damage model for progressive failure analysis of composite laminates subjected to various strain rate loadings
复制标题
用于不同应变率载荷下复合材料层合板渐进失效分析的一致性弹粘塑性损伤模型
DOI：
10.1016/j.compstruct.2016.03.049
复制
发表时间：
2016-07-15
影响因子：
6.3
通讯作者：
Morozov, Evgeny V.
中科院分区：
文献类型：
--
作者：
Chen, Jing-Fen;Morozov, Evgeny V.
本文关注的是开发和验证的一致性弹粘塑性损伤模型，占应变率相关的塑性响应和渐进后失效行为的复合材料。该模型适用于复合材料和结构在不同应变率下的渐进失效分析。应变率相关的屈服准则，而塑性加载和卸载的标准库恩-塔克条件仍然有效。同时，满足应变率相关材料的塑性一致性条件。提出了相应的应变驱动隐式数值积分方法。一个切线刚度算子，包括应变率相关的影响，并与开发的集成程序一致，以确保二次收敛速度有关的牛顿-拉夫逊方法在有限元分析。隐式积分算法通过用户自定义的材料子程序UMAT在有限元程序Abaqus中实现。S2/8552玻璃/环氧离轴块复合材料试样进行压缩在各种应变率的验证所提出的模型。结果表明，复合材料的应变率相关的响应被很好地捕捉和预测结果与文献报道的实验数据吻合良好。(C)2016爱思唯尔有限公司版权所有。
This paper is concerned with the development and validation of a consistency elasto-viscoplastic damage model that accounts for the strain rate-dependent plastic response and the progressive post-failure behaviour of composite materials. The model proposed is suitable for progressive failure analysis of composite materials and structures subjected to loadings at various strain rates. A strain rate-dependent yield criterion is adopted; whereas the standard Kuhn-Tucker conditions for plastic loading and unloading remain valid. Also, the plastic consistency condition for strain rate-dependent material is satisfied. The relevant strain-driven implicit numerical integration procedure for the proposed material model is developed. A tangent stiffness operator including the strain rate-dependent effects and consistent with the integration procedure developed is derived to ensure the quadratic convergence rate pertaining to the Newton-Raphson method in a finite element analysis. The implicit integration algorithm is implemented in the finite element code Abaqus through the user-defined material subroutine UMAT. The validation of the proposed model is performed on S2/8552 glass/epoxy off-axis block composite specimens subjected to compression at various strain rates. It is shown that the strain rate-dependent response of composite materials is well captured and the predicted results agree well with the experimental data reported in the literature. (C) 2016 Elsevier Ltd. All rights reserved.