...
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Elastic criterion for dislocation nucleation
【24h】

Elastic criterion for dislocation nucleation

机译:位错形核的弹性判据

获取原文
获取原文并翻译 | 示例
           

摘要

The notion of theoretical strength, the critical stress at which a perfect crystal under uniform loading becomes structurally unstable, is extended to non-uniform loading. A position-dependent defect nucleation criterion has been derived and applied in molecular dynamics (MD) and finite-element simulations of dislocation emission in single-crystal nanoindentation. The resulting measure has the physical meaning of a local stiffness; it provides a rigorous basis for modeling the incipient plasticity in a thin-film material. Furthermore, a close connection has been shown to exist between the initial unstable elastic wave and the final atomistic defect.
机译:理论强度的概念,即在均匀载荷下完美晶体在结构上不稳定时所处的临界应力,被扩展为非均匀载荷。推导了位置相关的缺陷成核标准,并将其应用于分子动力学(MD)和单晶纳米压痕中位错发射的有限元模拟。所得度量具有局部刚度的物理含义;它为建模薄膜材料的初期可塑性提供了严格的基础。此外,已经表明在初始的不稳定弹性波和最终的原子缺陷之间存在紧密的联系。

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