A bounding surface model for unsaturated soils considering the microscopic pore structure and interparticle bonding effect due to water menisci

2021 ◽  
Author(s):  
Bowen Han ◽  
Guoqing Cai ◽  
Annan Zhou ◽  
Jian Li ◽  
Chenggang Zhao
Keyword(s):  
Pore Structure ◽  
Unsaturated Soils ◽  
Surface Model ◽  
Bounding Surface ◽  
Bonding Effect ◽  
Interparticle Bonding

scholarly journals Bounding surface constitutive model for unsaturated soils considering microscopic pore structure and bonding effect

2020 ◽  
Vol 195 ◽  
pp. 02007
Author(s):  
Bowen Han ◽  
Guoqing Cai ◽  
Lin Xie ◽  
Jian Li ◽  
Chenggang Zhao
Keyword(s):  
Pore Structure ◽  
Unsaturated Soils ◽  
Characteristic Curve ◽  
Surface Model ◽  
Compression Tests ◽  
Bounding Surface ◽  
Hydraulic Hysteresis ◽  
Bonding Effect ◽  
Proposed Model ◽  
Skeleton Stress

This article presents a bounding surface model for unsaturated soils by using skeleton stress and bonding variable based on microcosmic pore structure as constitutive variables. A Hydraulic hysteresis soil-water characteristic curve model considering deformation and hydraulic hysteresis is combined to achieve hydraulic coupling. The proposed model can capture the change of the inter-particles bonding effect in the deformation process of unsaturated soils and accurately predict the hydraulic mechanical behavior of unsaturated soils under complicated loading paths and wetting-drying cycles. The validity of the proposed model is confirmed by the results of unsaturated isotropic compression tests, wetting-drying cycles tests and unsaturated triaxial shear tests reported in the literature.

scholarly journals Fractional-order bounding surface model for unsaturated soils under cyclic loading

2022 ◽  
Vol 141 ◽  
pp. 104529
Author(s):  
Guoqing Cai ◽  
Bowen Han ◽  
Annan Zhou ◽  
Jian Li ◽  
Chenggang Zhao
Keyword(s):  
Cyclic Loading ◽  
Fractional Order ◽  
Unsaturated Soils ◽  
Surface Model ◽  
Bounding Surface
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