• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Micro/Nano Forming Technology AWMFT 2012 >Investigation on the micro bending of metallic crystal by the non-local crystal plasticity finite element method
【24h】

Investigation on the micro bending of metallic crystal by the non-local crystal plasticity finite element method

机译：用非局部晶体塑性有限元方法研究金属晶体的微弯曲

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

A higher order dislocation density based crystal plasticity finite element method is adopted to investigate the deformation behaviours of metallic crystal during the process of micro bending,both statistically stored dislocations (SSDs) and geometrically necessary dislocations (GNDs) in each slip system are taken as the internal state variables.The combined effects of the microstructure heterogeneous,such as the orientation distribution of grains and dislocation density distribution,are described by means of the non-local model.Two models with different number of grains across the thickness are simulated,with the aim to investigate the evolutions and distributions of SSDs and GNDs,as well as the aggregation of GNDs in the neighbourhood of grain boundary.The calculated dislocation density distribution is compared with the micro hardness distribution obtained from the micro bending experiments.According to the results from the simulations and experiments,the strengthening effect of SSDs and GNDs during the micro bending are discussed,it is confirmed that the present physically based model gives an insight into the deformation mechanism and dislocation density evolution in the micro bending process.
机译：采用基于高阶位错密度的晶体塑性有限元方法研究金属晶体在微弯曲过程中的变形行为，将每个滑移系统中的统计存储的位错（SSD）和几何上必需的位错（GNDs）都作为通过非局部模型描述了微观组织异质的综合影响，如晶粒的取向分布和位错密度分布。模拟了两个不同厚度的晶粒的模型，目的研究SSD和GND的演化和分布，以及晶界附近GND的聚集情况。将计算出的位错密度分布与通过微弯曲实验获得的显微硬度分布进行比较。仿真实验，固态硬盘的加固效果讨论了微弯曲过程中的GNDs和GNDs，证实了当前基于物理的模型可以深入了解微弯曲过程中的变形机理和位错密度演变。

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