A unified nonlinear yield criterion for fracture and fault slip in quasi-brittle rocks
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In: European Journal of Mechanics, A/Solids, Vol. 108.2024, No. November-December, 105411, 01.11.2024.
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TY - JOUR
T1 - A unified nonlinear yield criterion for fracture and fault slip in quasi-brittle rocks
AU - You, Tao
AU - Zhao, Lun Yang
N1 - Publisher Copyright: © 2024 Elsevier Masson SAS
PY - 2024/11/1
Y1 - 2024/11/1
N2 - The micromechanical damage model has been developed to better describe multiscale fracture behavior in quasi-brittle rocks. While the deduced yield criterion under tension and compression has been carefully investigated in different stress spaces, it fails to capture a smooth transition from extension to shear fracture and overestimates the tensile strength of the rock. This paper introduces a unified nonlinear yield criterion based on a stress-dependent fracture energy parameter. In particular, the effect of the intermediate principal stress is encapsulated. The proposed yield criterion is then validated in the principal stress space based on a detailed parameter calibration procedure. Subsequently, four verification examples corresponding to Beishan granite, Lac du Bonnect granite, Carrara marble and Berea sandstone are carried out to show a desirable predictive capacity of the proposed yield criterion on progressive failure, extension to compressive-shear fracture transition and fault slip in quasi-brittle rocks.
AB - The micromechanical damage model has been developed to better describe multiscale fracture behavior in quasi-brittle rocks. While the deduced yield criterion under tension and compression has been carefully investigated in different stress spaces, it fails to capture a smooth transition from extension to shear fracture and overestimates the tensile strength of the rock. This paper introduces a unified nonlinear yield criterion based on a stress-dependent fracture energy parameter. In particular, the effect of the intermediate principal stress is encapsulated. The proposed yield criterion is then validated in the principal stress space based on a detailed parameter calibration procedure. Subsequently, four verification examples corresponding to Beishan granite, Lac du Bonnect granite, Carrara marble and Berea sandstone are carried out to show a desirable predictive capacity of the proposed yield criterion on progressive failure, extension to compressive-shear fracture transition and fault slip in quasi-brittle rocks.
KW - Fault slip
KW - Microcracks
KW - Micromechanics
KW - Nonlinear yield criterion
KW - Quasi-brittle rock
KW - Shear fracture
UR - http://www.scopus.com/inward/record.url?scp=85200459447&partnerID=8YFLogxK
U2 - 10.1016/j.euromechsol.2024.105411
DO - 10.1016/j.euromechsol.2024.105411
M3 - Article
AN - SCOPUS:85200459447
VL - 108.2024
JO - European Journal of Mechanics, A/Solids
JF - European Journal of Mechanics, A/Solids
SN - 0997-7538
IS - November-December
M1 - 105411
ER -