A thermodynamic-based model for modeling thermo-elastoplastic behaviors of saturated clayey soils considering bound water dehydration
作者机构:Department of BuildingCivil and Environmental EngineeringConcordia UniversityMontrealQuebecCanada
出 版 物:《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报(英文版))
年 卷 期:2023年第15卷第6期
页 面:1535-1546页
核心收录:
学科分类:081401[工学-岩土工程] 08[工学] 0818[工学-地质资源与地质工程] 0814[工学-土木工程]
主 题:Thermo-mechanical process Subloading yield surface Energy methods Clay-bound water Dehydration
摘 要:The non-isothermal deformation of soft mudrocks or clay soils is one of the most critical issues in energy and environmental related ***-related geomaterials hold complex microstructure and mineral composition,which brings difficulty in investigating their thermo-mechanical *** studies pay little attention to the difference between a thermal plastic strain and the strain from clay *** this study,a new constitutive model is proposed for describing the thermoelastoplastic behaviors of clayey soils under water-saturated *** effect of temperature variation and mechanical loading on elastoplastic strains and dehydration are *** thermodynamics laws and the unconventional plasticity are applied to quantify the thermo-mechanical *** irreversible strain is captured by using Cam-Clay plasticity and subloading yield surface *** dehydration strain is described by utilizing a novel method based on generalized thermodynamics approach and Helmholtz free energy *** internal variables,and the first and second laws of thermodynamics are applied in the *** hardening rule is established by implementing the laws of physical conservation,energy dissipation,and plastic *** proposed model is validated using specially designed thermal consolidation tests on laboratory prepared heavily consolidated clayey soils and some published data of clayey soils with different geological origins.