Mechanical fluctuations suppress the threshold of soft-glassy solids: The secular drift scenario.
Mechanical fluctuations suppress the threshold of soft-glassy solids: The secular drift scenario.
复制标题
机械波动抑制软玻璃态固体的阈值：长期漂移场景。
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Eric Clément
中科院分区：
文献类型：
--
作者：
Adeline Pons;A. Amon;T. Darnige;Jérôme Crassous;Eric Clément
我们提出了软玻璃非晶材料在屈服应力下受外力波动导致流化的动力学机制。该模型基于记忆效应和非线性的结合，导致长期的微小效应积累。我们在低于库仑阈值的机械驱动颗粒填料上测试此场景。我们提供了一个有效的粘性响应直接与小应力调制的证据，与一般长期漂移的理论预测一致。我们建议将这一结果推广到更大的一类玻璃系统。
We propose a dynamical mechanism leading to the fluidization by external mechanical fluctuations of soft-glassy amorphous material driven below the yield stress. The model is based on the combination of memory effect and nonlinearity, leading to an accumulation of tiny effects over a long term. We test this scenario on a granular packing driven mechanically below the Coulomb threshold. We provide evidence for an effective viscous response directly related to small stress modulations in agreement with the theoretical prediction of a generic secular drift. We propose to extend this result more generally to a large class of glassy systems.