Softening and Residual Loss Modulus of Jammed Grains under Oscillatory Shear in an Absorbing State
Softening and Residual Loss Modulus of Jammed Grains under Oscillatory Shear in an Absorbing State
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吸收状态振荡剪切下堵塞颗粒的软化和残余损耗模量
DOI：
10.1103/physrevlett.128.208002
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发表时间：
2022
影响因子：
8.6
通讯作者：
Hayakawa Hisao
中科院分区：
文献类型：
--
作者：
Otsuki Michio;Hayakawa Hisao
从理论研究的机械响应堵塞的材料，包括无摩擦和过阻尼颗粒振荡剪切下，我们发现，材料变得柔软，和损耗模量保持非零，即使在吸收状态下，任何不可逆的塑性变形不存在。在这个区域中的颗粒的轨迹表现出磁滞回线。借助傅立叶分析，我们成功地阐明了材料软化的根源和残余损耗模量。我们还阐明了屈服点在软化中的作用，以区分吸收状态下的塑性变形和可逆变形。
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 nonzero 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 plastic deformation from reversible deformation in the absorbing state.