Mechanical fluctuations suppress the threshold of soft-glassy solids : the secular drift scenario
arXiv:1412.3288 · doi:10.1103/PhysRevE.92.020201
Abstract
We propose a dynamical mechanism leading to the fluidization of soft-glassy amorphous mate-rial driven below the yield-stress by external mechanical fluctuations. The model is based on the combination of memory effect and non-linearity, 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 bring evidences for an effective viscous response directly related to small stress modulations in agreement with the theoretical prediction of a generic secular drift.
References in corpus (6)
- Plastic Response of a 2D Lennard-Jones amorphous solid: Detailed analysis of the local rearrangements at very slow strain-rate
- Soft Sphere Packings at Finite Pressure but Unstable to Shear
- Continuum modeling of mechanically-induced creep in dense granular materials
- On the relevance of disorder in athermal amorphous materials under shear
- Rheology of athermal amorphous solids: Revisiting simplified scenarios and the concept of mechanical noise temperature
- Invited review: Effect of temperature on a granular pile
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