Numerical Implementation of a Hydro-Mechanical Coupling Constitutive Model for Unsaturated Soil Considering the Effect of Micro-Pore Structure

An unsaturated soil constitutive model considering the influence of microscopic pore structure can more accurately describe the hydraulic–mechanical behavior of unsaturated soil, but its numerical implementation is more complicated. Based on the fully implicit Euler backward integration algorithm, t...

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Vydáno v:Applied sciences Ročník 11; číslo 12; s. 5368
Hlavní autoři: Cai, Guoqing, Han, Bowen, Li, Mengzi, Di, Kenan, Liu, Yi, Li, Jian, Wu, Tianchi
Médium: Journal Article
Jazyk:angličtina
Vydáno: Basel MDPI AG 01.06.2021
Témata:
Algorithms
constitutive model
hydro-mechanical coupling
implicit integration algorithm
Mechanical properties
micro-pore structure
numerical simulation
Shear strain
Stress state
unsaturated soil
Variables
ISSN:2076-3417, 2076-3417
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Shrnutí:An unsaturated soil constitutive model considering the influence of microscopic pore structure can more accurately describe the hydraulic–mechanical behavior of unsaturated soil, but its numerical implementation is more complicated. Based on the fully implicit Euler backward integration algorithm, the ABAQUS software is used to develop the established hydro-mechanical coupling constitutive model for unsaturated soil, considering the influence of micro-pore structure, and a new User-defined Material Mechanical Behavior (UMAT) subroutine is established to realize the numerical application of the proposed model. The developed numerical program is used to simulate the drying/wetting cycle process of the standard triaxial specimen. The simulation results are basically consistent with those calculated by the Fortran program, which verifies the rationality of the developed numerical program.
Bibliografie:ObjectType-Article-1
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ISSN:2076-3417
2076-3417
DOI:10.3390/app11125368