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 -