论文标题
晶体中的非弹性旋转和伪扰动的塑料雪崩
Inelastic rotations and pseudo-turbulent plastic avalanches in crystals
论文作者
论文摘要
晶体中的塑性变形通常以无数晶格的随机定向斑块的形式产生纹理。我们使用一种新型的晶体可塑性介观式型模型，以表明在此类纹理中，大型晶体学晶格旋转可以源自微观上的高度协调的非弹性滑动。我们的数值实验表明，导致这种旋转形成的脱位雪崩涉及伪扰动的动作，该运动与幂律分布式空间相关性。
Plastic deformations in crystals often produce textures in the form of randomly oriented patches of the unstressed lattice. We use a novel mesoscopic Landau-type model of crystal plasticity to show that in such textures large crystallographic lattice rotations can originate from a highly coordinated inelastic slip at the microscale. Our numerical experiments show that dislocation avalanches, which lead to the formation of such rotations, involve pseudo-turbulent motions with power-law distributed spatial correlations.
