Journal
COMPUTATIONAL PARTICLE MECHANICS
Volume 7, Issue 5, Pages 1047-1055Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s40571-020-00341-6
Keywords
FDEM; Fracture; Mixed-mode failure; Carrara marble; Confined extension
Funding
- National Nuclear Security Administration of the U.S. Department of Energy [89233218CNA000001]
- U.S. Department of Energy
- Department of Homeland Security under the Department of Energy [LA-UR-19-32443]
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It has been shown experimentally that under mixed tensile and compressive stress states, a corresponding mixed-mode fracture will occur. In this paper, the formation of mixed-mode fractures is investigated using the combined finite-discrete element method. A series of simulations with confining pressures ranging from 7.5 to 150 MPa generate a spectrum of mixed-mode failure conditions. These stress states at failure span the transition from the tensile to compressive failure. The models reproduce previous experiments on Carrara marble using a dog-bone geometry, and a comparison shows good qualitative agreement with the experimental observations. This paper demonstrates that mixed-mode fracture can be captured via numerical simulations and identifies areas where further research is required to better understand mixed-mode fracture processes.
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