Disordered solids often change their elastic response as they slowly age. Using experiments and simulations, we study how aging disordered planar networks under an applied stress affects their nonlinear elastic response. We are able to modify dramatically the elastic properties of our systems in the nonlinear regime. Using simulations, we study two models for the microscopic evolution of properties of such a material; the first considers changes in the material strength, while the second considers distortions in the microscopic geometry. Both models capture different aspects of the experiments including the encoding of memories of the aging history of the system and the dramatic effects on the material's nonlinear elastic properties. Our results demonstrate how aging can be used to create complex elastic behavior in the nonlinear regime.

中文翻译：

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定向时效对材料非线性弹性和记忆形成的影响

紊乱的固体经常随着年龄的增长而改变其弹性反应。通过实验和仿真，我们研究了在施加应力的情况下老化的无序平面网络如何影响其非线性弹性响应。我们能够在非线性状态下极大地修改我们系统的弹性特性。使用模拟，我们研究了两种模型，用于这种材料的特性的微观演化。第一个考虑材料强度的变化，而第二个考虑微观几何形状的变形。两种模型都捕获了实验的不同方面，包括对系统老化历史的记忆进行编码以及对材料的非线性弹性特性的巨大影响。我们的结果证明了如何在非线性状态下使用老化来创建复杂的弹性行为。