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Integrating RFPA and DEM in Adaptive RDFA Modeling of Rock Fracturing Process
This paper proposes a hybrid rock discrete fracture analysis (RDFA) method that combines the rock failure process analysis (RFPA) method and discrete element method. Based on the continuum mechanics, statistical damage mechanics, and contact theory, RDFA offers a comprehensive framework to simulate the continuous–discontinuous behaviors encompassing fracture and fragmentation within rocks. Through the newly developed nodal updating scheme, RDFA enables adaptive node adjustments at critical crack tips once the strength criteria is met, effectively capturing the initiation and propagation of zero-thickness cracks. Notably, RDFA accommodates the heterogeneity of rock masses, allowing for the synchronized consideration of localized damage and fine-crack evolution. RDFA was calibrated by modelling the Brazilian splitting tests on rock, aligning closely with the analytical solutions. Subsequently, the rock specimens containing single or double flaws were uniaxially compressed. The results showed that when the flaw inclination angle α increased from 0° to 60°, the distance between the initiation position of cracks and the flaw tip decreased exponentially; the crack initiation stress first decreased and then increased with the growth of α, and when α = 30°, it reached the minimum value of 15.2 MPa. RDFA can effectively replicate rock fracturing processes, failure modes, and critical strengths across diverse inclinations.
The rock discrete fracture analysis method was proposed by combining the rock failure process analysis method and discrete element method.
It enables adaptive node adjustments at the critical crack tips using the newly developed nodal updating scheme.
It can effectively capture the initiation and propagation of zero-thickness cracks.
It accommodates the heterogeneity of rock masses, allowing for the synchronized consideration of localized damage and fine-crack evolution.
Integrating RFPA and DEM in Adaptive RDFA Modeling of Rock Fracturing Process
This paper proposes a hybrid rock discrete fracture analysis (RDFA) method that combines the rock failure process analysis (RFPA) method and discrete element method. Based on the continuum mechanics, statistical damage mechanics, and contact theory, RDFA offers a comprehensive framework to simulate the continuous–discontinuous behaviors encompassing fracture and fragmentation within rocks. Through the newly developed nodal updating scheme, RDFA enables adaptive node adjustments at critical crack tips once the strength criteria is met, effectively capturing the initiation and propagation of zero-thickness cracks. Notably, RDFA accommodates the heterogeneity of rock masses, allowing for the synchronized consideration of localized damage and fine-crack evolution. RDFA was calibrated by modelling the Brazilian splitting tests on rock, aligning closely with the analytical solutions. Subsequently, the rock specimens containing single or double flaws were uniaxially compressed. The results showed that when the flaw inclination angle α increased from 0° to 60°, the distance between the initiation position of cracks and the flaw tip decreased exponentially; the crack initiation stress first decreased and then increased with the growth of α, and when α = 30°, it reached the minimum value of 15.2 MPa. RDFA can effectively replicate rock fracturing processes, failure modes, and critical strengths across diverse inclinations.
The rock discrete fracture analysis method was proposed by combining the rock failure process analysis method and discrete element method.
It enables adaptive node adjustments at the critical crack tips using the newly developed nodal updating scheme.
It can effectively capture the initiation and propagation of zero-thickness cracks.
It accommodates the heterogeneity of rock masses, allowing for the synchronized consideration of localized damage and fine-crack evolution.
Integrating RFPA and DEM in Adaptive RDFA Modeling of Rock Fracturing Process
Rock Mech Rock Eng
Gong, Bin (Autor:in) / Zhao, Tao (Autor:in) / Thusyanthan, Indrasenan (Autor:in) / Tang, Chun’an (Autor:in) / Zhou, Gordon G. D. (Autor:in)
Rock Mechanics and Rock Engineering ; 58 ; 2569-2587
01.02.2025
19 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Rock mechanics , Crack propagation , Continuous–discontinuous modeling , Finite element method , Discrete element method , Adaptive node adjustment Engineering , Resources Engineering and Extractive Metallurgy , Earth Sciences , Geophysics/Geodesy , Civil Engineering , Earth and Environmental Science
Integrating RFPA and DEM in Adaptive RDFA Modeling of Rock Fracturing Process
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