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Dislocation-based crystal plasticity FE analysis for kink band formation in Mg-based LPSO phase considering higher-order stress

机译:考虑高阶应力的基于位错的晶体塑性有限元分析,用于基于镁的LPSO相中的扭结带形成

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An FE analysis has been performed for a single crystal of long-period stacking ordered phase on the basis of the dislocation-based crystal plasticity model considering higher-order stress. The mesh dependence on the kink band formation has been discussed from the viewpoint of the strain gradient and size effect. Then, it is shown that the mesh dependence of kink deformation in the FE analysis can be removed even when the scale ratio is relatively small. Moreover, it is indicated that the disclination quadrupole structure in the kink band can be expressed qualitatively by use of the incompatibility of crystal slip.
机译:在考虑到高阶应力的基于位错的晶体可塑性模型的基础上,对长周期堆积有序相的单晶进行了有限元分析。从应变梯度和尺寸效应的角度讨论了网格对扭结带形成的依赖性。然后,表明即使比例比相对较小,也可以消除有限元分析中扭结变形的网格依赖性。此外,表明可以通过使用晶体滑移的不相容性来定性表达扭结带中的错位四极结构。

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