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摘要翻译：
塑性屈服开始时存在一个有限的阈值，即屈服应力，这是塑性力学的一个普遍特征。这种干扰-非干扰转换自然地由双稳态内部态场的动力学来解释。在非晶塑性的非热剪切相变区(STZ)理论中，我们证明了相变伴随着塑性前沿的传播。我们进一步表明，平均场理论不能选择这些锋的速度，并且超出了平均场的描述，包括涨落和相关效应，导致方程中出现新的非局部项。最后，我们证明了新的项，以及相关的内在长度尺度，为塑性前沿提供了一个速度选择机制。
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英文标题：
《Fronts Propagation at the Onset of Plastic Yielding》
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作者：
Eran Bouchbinder and Ting-Shek Lo
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Materials Science 材料科学
分类描述：Techniques, synthesis, characterization, structure. Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术，合成，表征，结构。结构相变，力学性质，声子。缺陷，吸附质，界面
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
The existence of a finite threshold, the yield stress, for the onset of plastic yielding is a universal feature of plasticity. This jamming-unjamming transition is naturally accounted for by the dynamics of a bistable internal state field. We show, within the athermal Shear Transformation Zones (STZ) theory of amorphous plasticity, that the transition is accompanied by the propagation of plastic fronts. We further show that the mean-field theory cannot select the velocity of these fronts and go beyond the mean-field description to include fluctuations and correlations effects, resulting in new nonlocal terms in the equations. Finally, we demonstrate that the new terms, with an associated intrinsic lengthscale, provide a velocity selection mechanism for the plastic fronts.
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PDF链接：
https://arxiv.org/pdf/707.4573
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