Response of Macro‐ and Micromechanical Characteristics of Mudstone Under Dynamic Impact Based on FDM‐DEM Coupling DOI Creative Commons
Jiangkun Yang, Hongfa Ma, Feng Wang

et al.

Geofluids, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

The blasting at a site can cause impact disturbances to an open‐pit mine slope. For further study the dynamic mechanical properties of rock masses in slope, this paper, mudstone slope Inner Mongolia Autonomous Region China was taken as research object. Through indoor split‐Hopkinson test and finite difference method discrete element coupling simulation (FDM‐DEM), macro micro response under different velocities studied. results showed that load, exhibited significant strain rate effects. postpeak plasticity varied exponentially increasing changes. crack propagation process be divided into undamaged, initiation, propagation, rupture stages. As velocity increased, initiation stage more microcracks, cracks opening became larger. 3D numerical model satisfy stress effectiveness during process. During process, microcracks increased sharply before peak stress, there lag between maximum point increment stress. A large number internal developed stage, cumulative reverse “Z” shape.

Language: Английский

Response of Macro‐ and Micromechanical Characteristics of Mudstone Under Dynamic Impact Based on FDM‐DEM Coupling DOI Creative Commons
Jiangkun Yang, Hongfa Ma, Feng Wang

et al.

Geofluids, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

The blasting at a site can cause impact disturbances to an open‐pit mine slope. For further study the dynamic mechanical properties of rock masses in slope, this paper, mudstone slope Inner Mongolia Autonomous Region China was taken as research object. Through indoor split‐Hopkinson test and finite difference method discrete element coupling simulation (FDM‐DEM), macro micro response under different velocities studied. results showed that load, exhibited significant strain rate effects. postpeak plasticity varied exponentially increasing changes. crack propagation process be divided into undamaged, initiation, propagation, rupture stages. As velocity increased, initiation stage more microcracks, cracks opening became larger. 3D numerical model satisfy stress effectiveness during process. During process, microcracks increased sharply before peak stress, there lag between maximum point increment stress. A large number internal developed stage, cumulative reverse “Z” shape.

Language: Английский

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