Elastoplastic behavior of yield stress fluids
Elastoplastic behavior of yield stress fluids
复制标题
屈服应力流体的弹塑性行为
DOI：
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发表时间：
2019
影响因子：
2.7
通讯作者：
P. Coussot
中科院分区：
文献类型：
--
作者：
E. N’gouamba;J. Goyon;P. Coussot
通过叠加在蠕变和随后的恢复测试的小变形的增量弹性模量，我们遵循各种软堵塞系统（屈服应力流体）在其固体政权的结构状态。我们表明，固体状态的材料是与一个持久的弹性网络的恒定的弹性模量屈服（固-液过渡），而逐步更多的额外的弹塑性元素参与。这些弹塑性元素的主要特点，即增加的塑性和弹性变形分量与剪切应力的平方，揭示了一个简单的通用模型（独立的材料结构）描述的不同组成部分的机械行为的这种系统在其固体政权的基本特征。
By means of the incremental elastic modulus for small deformations superimposed on creep and subsequent recovery tests, we follow the structural state of various soft-jammed systems (yield stress fluids) in their solid regime. We demonstrate that the solid state of the material is associated with a persistent elastic network of constant elastic modulus up to yielding (solid-liquid transition), while progressively more additional elastoplastic elements are involved. The main features of these elastoplastic elements, i.e. increase of both the plastic and the elastic deformation components with the square of the shear stress, reveal the fundamental characteristics of a simple generic model (independent of material structure) describing the different components of the mechanical behavior of such systems in their solid regime.