...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Plasticity >Evaluation of finite element based analysis of 3D multicrystalline aggregates plasticity - Application to crystal plasticity model identification and the study of stress and strain fields near grain boundaries
【24h】

Evaluation of finite element based analysis of 3D multicrystalline aggregates plasticity - Application to crystal plasticity model identification and the study of stress and strain fields near grain boundaries

机译：基于有限元的3D多晶骨料可塑性分析评价-在晶体可塑性模型辨识和晶界附近应力应变场研究中的应用。

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

Plastic heterogeneities of hexagonal close-packed (HCP) materials are numerically investigated at the grain level. Intensive use of parallel Finite Elements computations enables us to study micro-plasticity of realistic 3D multicrystalline aggregates, including, macroscopic mechanical responses but also average responses in each grain and particularly local stress and strain fields. This paper focuses on three applications of this simulation method. The first part of this paper is devoted to a fine analysis of micro-plasticity of HCP materials. Intergranular but also intragranular stress and strain heterogeneities are described and micro-plasticity patterns are displayed throughout the 3D microstructures. A special attention is paid to the sensitivity of simulations with respect to the mesh discretization, the element interpolation and the geometrical representation of grain boundaries, in terms of macroscopic and local responses. Later, a simplified homogenization method is evaluated, regarding results of the first part. Afterwards, this method is applied with a zirconium alloy to identify a set of coefficients for a single crystal plasticity model. Finally, in order to provide critical information for intergranular damage phenomena (reported in literature for zirconium alloys), the third part provides a statistical analysis of over-stresses at grain boundaries. (C) 2004 Elsevier Ltd. All rights reserved.
机译：在晶粒水平上对六角形密堆积（HCP）材料的塑性异质性进行了数值研究。大量使用并行有限元计算使我们能够研究逼真的3D多晶硅聚集体的微观可塑性，包括宏观机械响应以及每个晶粒的平均响应，尤其是局部应力和应变场。本文重点介绍这种仿真方法的三个应用。本文的第一部分致力于精细分析HCP材料的微观可塑性。描述了晶间应力以及晶内应力和应变的异质性，并在整个3D微结构中显示了微塑性模式。在宏观和局部响应方面，应特别注意模拟在网格离散化，元素插值和晶界几何表示方面的敏感性。随后，针对第一部分的结果，评估了一种简化的均质化方法。然后，将这种方法与锆合金一起使用，以识别单晶塑性模型的一组系数。最后，为了提供晶间损伤现象的关键信息（文献中报道的锆合金），第三部分提供了对晶界处超应力的统计分析。 （C）2004 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