• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >A consistency elasto-viscoplastic damage model for progressive failure analysis of composite laminates subjected to various strain rate loadings
【24h】

A consistency elasto-viscoplastic damage model for progressive failure analysis of composite laminates subjected to various strain rate loadings

机译：用于不同应变速率载荷下复合材料层板渐进破坏分析的一致性弹黏塑性损伤模型

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

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.
机译：本文关注的是开发和验证一致性弹黏塑性损伤模型，该模型考虑了应变率相关的塑性响应和复合材料的破坏后行为。提出的模型适用于复合材料和结构在各种应变速率下承受载荷的渐进式破坏分析。采用应变率相关的屈服准则；而标准的Kuhn-Tucker塑料装卸条件仍然有效。而且，满足应变率相关材料的塑性稠度条件。针对所提出的材料模型，开发了相关的应变驱动隐式数值积分程序。推导了一个切线刚度算子，该算子包括与应变率有关的效应并且与所开发的积分程序一致，以确保在有限元分析中与牛顿-拉夫森法有关的二次收敛率。隐式积分算法是通过用户定义的材料子例程UMAT在有限元代码Abaqus中实现的。对在不同应变速率下受压的S2 / 8552玻璃/环氧树脂离轴嵌段复合材料样品进行了所提出模型的验证。结果表明，复合材料的应变率相关响应得到了很好的捕获，预测结果与文献报道的实验数据吻合良好。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号