作为非晶态固体剪切软化机制的渗流塑性破坏

无序有益于你：局部无序对应变软化材料应变局部化和延性的影响

Disorder is good for you: The influence of local disorder on strain localization and ductility of strain softening materials

我们制定了一个通用的概念模型的变形局部无序，宏观均匀的材料，经历不可逆的应变软化过程中塑性形变。我们调查的影响程度的微观结构的异质性和混乱的伴随应变局部化过程（形成的宏观剪切带）。结果表明，增加微观结构的不均匀性延迟应变局部化，并导致宏观应力-应变曲线的塑性区的增加。不断变化的应变局部化模式的特点和比较模型的剪切带形成在文献中发表。

Softening and residual loss modulus of jammed grains under oscillatory shear in an absorbing state

From a theoretical study of the mechanical response of jammed materials comprising frictionless and overdamped particles under oscillatory shear, we find that the material becomes soft, and the loss modulus remains finite even in an absorbing state where any irreversible plastic deformation does not exist. The trajectories of the particles in this region exhibit hysteresis loops. We succeed in clarifying the origin of the softening of the material and the residual loss modulus with the aid of Fourier analysis. We also clarify the roles of the yielding point in the softening to distinguish the …

带软化的弹塑性作为状态依赖扫掠过程：弹簧晶格中解的非唯一性与剪切带的涌现

Elastoplasticity with softening as a state-dependent sweeping process: non-uniqueness of solutions and emergence of shear bands in lattices of springs

针对带软化弹塑性问题因单调性丧失导致的不适定性，提出状态依赖扫掠过程求解含各类弹簧的弹塑性晶格弹簧模型演化，通过模拟与解析验证解的非唯一性及剪切带涌现，发现隐式追赶算法不动点的不连续分岔现象。

非晶塑性剪切转变区的动力学：最小理论中的能量约束

Dynamics of Shear-Transformation Zones in Amorphous Plasticity: Energetic Constraints in a Minimal Theory

我们使用精力充沛的考虑推导出一个以前不确定的耦合项的形式在非晶态固体的塑性形变的剪切转变区（STZ）理论。正如在STZ理论的早期版本中，在屈服应力下的稳定变形的开始在这里表现为堵塞状态和塑性变形状态之间的动态稳定性的交换。我们展示了如何一个特别简单的“准线性”版本的理论帐户定性的塑性，如屈服，应变软化，应变恢复的许多功能。我们还表明，这个最小版本的理论未能描述某些其他现象，并认为这些限制表明需要额外的内部自由度超出这些包括在这里。

Shear-wave-induced softening and simultaneous compaction in dense granular media through acoustic lubrication at flow heterogeneities

We report the simultaneous softening and compaction of a confined dense granular pack in acoustic resonance experiments. Elastic softening is manifested by a reduction of the shear-wave speed, as the wave amplitude increases beyond some threshold. No macroscopic rearrangement of grains or dilatancy is observed; instead, elastic softening is accompanied by a tiny amount of compaction on the scale of grain asperities. We explain these apparent contradictory observations using a theoretical model, based on shear transformation zones (STZs), of soft spots and slipping contacts. It predicts a linea…

Dynamic phase diagram of plastically deformed amorphous solids at finite temperature

The yielding transition that occurs in amorphous solids under athermal quasistatic deformation has been the subject of many theoretical and computational studies. Here, we extend this analysis to include thermal effects at finite shear rate, focusing on how temperature alters avalanches. We derive a nonequilibrium phase diagram capturing how temperature and strain rate effects compete, when avalanches overlap, and whether finite-size effects dominate over temperature effects. The predictions are tested through simulations of an elastoplastic model in two dimensions and in a mean-field approxim…