Journal
ACTA GEOTECHNICA
Volume 14, Issue 4, Pages 1161-1193Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11440-018-0709-7
Keywords
3-D numerical simulations; Compressive-shear tests; Conjugated bond-pair-based peridynamics; Fracturing behaviors; Intermittent fissures; Rock-like materials
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Funding
- National Natural Science Foundation of China [51839009, 51679017]
- National Program on Key Basic Research 973 Project of China [2014CB046903]
- Fundamental Research Funds for the Central Universities [106112017CDJXSYY0001]
- Natural Science Foundation Project of CQ-CSTC [cstc2016jcyjys0005, cstc2017jcyj-yszxX0013, cstc2017jcyjA1250]
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A 3-D conjugated bond-pair-based peridynamic model is developed to comprehensively investigate failure characteristics of rock-like materials with intermittent fissures in the compressive-shear loading tests. Rock-like specimens containing one single central fissure are first simulated. Numerical results indicate that the 3-D conjugated bond-pair-based peridynamic model can faithfully reproduce failure characteristics of rock-like materials under compressive-shear loads. Then, the failure characteristics of rock-like specimens containing two parallel central intermittent fissures are numerically investigated. Effects of fissure inclination angle, fissure ligament length and rock bridge angle on fracturing behaviors, such as crack coalescence patterns, are also studied as well as crack initiation stress and coalescence stress.
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