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On the atomistic simulation of plastic deformation and fracture in crystals

机译:关于晶体塑性变形和断裂的原子模拟

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摘要

Tensile stretching of a two-dimensional model crystal was computationally studied using molecular statics simulations. Attention was directed to the atomistics of defect activities throughout the deformation history. It is shown that the incorporation of an initial point defect is able to trigger dislocation slip in a repetitive and controlled manner. The initial defect is also seen to have potential bearing on the formation of voiding damage that leads to ductile fracture of the crystal. Implications to the nanoscale mechanical behavior and its modeling are discussed.
机译:使用分子静态模拟,对二维模型晶体的拉伸进行了计算研究。在整个变形历史中,注意力都集中在缺陷活动的原子性上。结果表明,合并初始点缺陷能够以重复和受控的方式触发位错滑移。还可以看出,最初的缺陷可能与空洞破坏的形成有关,从而导致晶体的韧性断裂。讨论了对纳米级力学行为及其建模的影响。

著录项

  • 来源
    《Journal of Materials Research》 |2004年第4期|p.973-976|共4页
  • 作者

    Y-L. Shen;

  • 作者单位

    Department of Mechanical Engineering, University of New Mexico, Albuquerque, New Mexico 87131;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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