• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanics of materials >A dislocation climb/glide coupled crystal plasticity constitutive model and its finite element implementation
【24h】

A dislocation climb/glide coupled crystal plasticity constitutive model and its finite element implementation

机译：位错爬升/滑移耦合晶体塑性本构模型及其有限元实现

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

The glide and climb of dislocations are two important plastic deformation mechanisms of the metallic crystals at elevated temperatures. In this work, a new dislocation density-based constitutive model for single crystal plasticity with explicit consideration of both dislocation glide and climb is presented. Three contributions of dislocation climb to the plastic deformation are involved: the kinematics, the climb-enhanced dislocation mobility and the climb-induced dislocation annihilation. A fully implicit time-integration scheme for this model is given and implemented by a user material subroutine in software ABAQUS. Then, the compression tests of 110 single crystalline aluminum at high temperature and low strain rate are simulated, showing good agreements with the experimental results. Moreover, this model is used to predict the creep deformation of single crystalline aluminum at different temperatures and applied stress levels. The results show that the present model can capture the power law creep behavior of single crystalline aluminum and the predicted creep exponent falls within the range suggested by earlier research.
机译：位错的滑移和爬升是金属晶体在高温下的两个重要的塑性变形机制。在这项工作中，提出了一种新的基于位错密度的单晶塑性本构模型，其中明确考虑了位错滑行和爬升。位错爬升对塑性变形的三个贡献涉及：运动学，爬升增强的位错迁移率和爬升引起的位错an灭。该模型的完全隐式时间积分方案由ABAQUS软件中的用户资料子例程给出并实现。然后，模拟了<110>单晶铝在高温和低应变率下的压缩试验，与实验结果吻合良好。此外，该模型用于预测单晶铝在不同温度和施加应力水平下的蠕变变形。结果表明，该模型可以捕获单晶铝的幂律蠕变行为，并且预测的蠕变指数落在早期研究建议的范围内。

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