Shear banding in unsaturated geomaterials through a strong nonlocal hydromechanical model
Shear banding in unsaturated geomaterials through a strong nonlocal hydromechanical model
复制标题
通过强大的非局部流体力学模型研究非饱和岩土材料中的剪切带
DOI：
10.1080/19648189.2020.1797889
复制
发表时间：
2021
影响因子：
2.1
通讯作者：
Song, Xiaoyu
中科院分区：
文献类型：
--
作者：
Menon, Shashank;Song, Xiaoyu
我们提出了一个强大的非局部流体力学模型制定基于状态为基础的周波模拟应变局部化非饱和岩土材料。控制方程是积分-微分方程，其中骨架变形和孔隙流体流动都假定为长度尺度。最近提出的流体力学对应原理是通过实施经典的局部本构模型的固体骨架，和广义达西定律的非局部流体力学模型的非饱和水流。对非饱和岩土材料中剪切带的形成进行了数值模拟，研究了流体力学长度尺度和机械加载速率对剪切带形成的影响。数值结果表明，变形和孔隙水压力都集中在有限厚度的剪切带内。数值结果表明，流体力学长度尺度和机械加载速率均影响非饱和岩土剪切带的形成和非饱和岩土承载力峰值。
We present a strong nonlocal hydromechanical model formulated based on state-based peridynamics for simulating strain localisation in unsaturated geomaterials. The governing equations are integro-differential equations in which length scales are assumed for both the skeleton deformation and pore fluid flow. Recently proposed hydromechanical correspondence principle is adopted to implement the classical local constitutive model for the solid skeleton, and the generalised Darcy’s law for unsaturated water flow into the nonlocal hydromechanical model. Numerical simulations of shear bands in unsaturated geomaterials were conducted to investigate the effect of the hydromechanical length scale and the mechanical loading rate on the formation of shear bands. The numerical results have shown that both the deformation and pore water pressure are concentrated in the shear bands with a finite thickness. The numerical results have demonstrated that both the hydromechanical length scale and the mechanical loading rate affect the formation of shear bands in unsaturated geomaterials and the peak value of the load capacity of unsaturated geomaterials.
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DOI：
10.1080/19648189.2012.666900
发表时间：
2012-01
影响因子：
2.1
作者：
M. Jrad;B. Sukumaran;A. Daouadji
通讯作者：
M. Jrad;B. Sukumaran;A. Daouadji
影响因子：
5.7
作者：
Xiaoyu Song;Shashank Menon
通讯作者：
Xiaoyu Song;Shashank Menon
影响因子：
2.7
作者：
Shashank Menon;Xiaoyu Song
通讯作者：
Shashank Menon;Xiaoyu Song
Cosserat 连续体中的热-水-机械耦合和应变局部化：在断层快速剪切稳定性分析中的应用
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
H. Rattez
通讯作者：
H. Rattez