A novel nonlocal thermo-hydro-mechanical coupling model is proposed to investigate cracking behaviors of quasi-brittle materials in the framework of advanced general particle dynamics (GPD). The nonlocal thermal conduction equation and the nonlocal flow diffusion equation are derived based on nonlocal vector calculus and the microscopic constitutive equation. Moreover, the coupling influences are considered based on the nonlocal equation and the coupling principle. The governing equation of the coupling system is established in the framework of GPD. The correctness of the proposed model is verified through comparing with the corresponding experimental data, and the numerical results are in good agreement with experimental results. Finally, the proposed model is applied to analyze the deformation and cracking behaviors of rock mass around tunnels, and the stress redistribution is revealed under thermo-hydro-mechanical coupling condition.
The nonlocal thermo-hydro-mechanical model for cracking behaviors of quasi-brittle materials in the framework of advanced general particle dynamics / Zhou, X.; Yao, W.; Du, E.; Bi, J.; Berto, F.. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 46:7(2023), pp. 2439-2457. [10.1111/ffe.14008]
The nonlocal thermo-hydro-mechanical model for cracking behaviors of quasi-brittle materials in the framework of advanced general particle dynamics
Berto F.
2023
Abstract
A novel nonlocal thermo-hydro-mechanical coupling model is proposed to investigate cracking behaviors of quasi-brittle materials in the framework of advanced general particle dynamics (GPD). The nonlocal thermal conduction equation and the nonlocal flow diffusion equation are derived based on nonlocal vector calculus and the microscopic constitutive equation. Moreover, the coupling influences are considered based on the nonlocal equation and the coupling principle. The governing equation of the coupling system is established in the framework of GPD. The correctness of the proposed model is verified through comparing with the corresponding experimental data, and the numerical results are in good agreement with experimental results. Finally, the proposed model is applied to analyze the deformation and cracking behaviors of rock mass around tunnels, and the stress redistribution is revealed under thermo-hydro-mechanical coupling condition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.