A phase-field fracture model in thermo-poro-elastic media with micromechanical strain energy degradation
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in: Computer methods in applied mechanics and engineering, Jahrgang 429.2024, Nr. 1 September, 117165, 01.09.2024.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - A phase-field fracture model in thermo-poro-elastic media with micromechanical strain energy degradation
AU - Liu, Yuhao
AU - Yoshioka, Keita
AU - You, Tao
AU - Li, Hanzhang
AU - Zhang, Fengshou
N1 - Publisher Copyright: © 2024 Elsevier B.V.
PY - 2024/9/1
Y1 - 2024/9/1
N2 - This work extends the hydro-mechanical phase-field fracture model to non-isothermal conditions with micromechanics based poroelasticity, which degrades Biot's coefficient not only with the phase-field variable (damage) but also with the energy decomposition scheme. Furthermore, we propose a new approach to update porosity solely determined by the strain change rather than damage evolution as in the existing models. As such, these poroelastic behaviors of Biot's coefficient and the porosity dictate Biot's modulus and the thermal expansion coefficient. For numerical implementation, we employ an isotropic diffusion method to stabilize the advection-dominated heat flux and adapt the fixed stress split method to account for the thermal stress. We verify our model against a series of analytical solutions such as Terzaghi's consolidation, thermal consolidation, and the plane strain hydraulic fracture propagation, known as the KGD fracture. Finally, numerical experiments demonstrate the effectiveness of the stabilization method and intricate thermo-hydro-mechanical interactions during hydraulic fracturing with and without a pre-existing weak interface.
AB - This work extends the hydro-mechanical phase-field fracture model to non-isothermal conditions with micromechanics based poroelasticity, which degrades Biot's coefficient not only with the phase-field variable (damage) but also with the energy decomposition scheme. Furthermore, we propose a new approach to update porosity solely determined by the strain change rather than damage evolution as in the existing models. As such, these poroelastic behaviors of Biot's coefficient and the porosity dictate Biot's modulus and the thermal expansion coefficient. For numerical implementation, we employ an isotropic diffusion method to stabilize the advection-dominated heat flux and adapt the fixed stress split method to account for the thermal stress. We verify our model against a series of analytical solutions such as Terzaghi's consolidation, thermal consolidation, and the plane strain hydraulic fracture propagation, known as the KGD fracture. Finally, numerical experiments demonstrate the effectiveness of the stabilization method and intricate thermo-hydro-mechanical interactions during hydraulic fracturing with and without a pre-existing weak interface.
KW - Fixed stress split
KW - Hydraulic fracturing
KW - Isotropic diffusion method
KW - Phase-field
KW - Thermo-hydro-mechanical coupling
KW - Thermo-poroelasticity
UR - http://www.scopus.com/inward/record.url?scp=85196637142&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2024.117165
DO - 10.1016/j.cma.2024.117165
M3 - Article
VL - 429.2024
JO - Computer methods in applied mechanics and engineering
JF - Computer methods in applied mechanics and engineering
SN - 0045-7825
IS - 1 September
M1 - 117165
ER -