Fragmentation analyses of rocks under high-velocity impacts using the combined finite-discrete element simulation
نویسندگان
چکیده
The impact-induced fragmentation of rock blocks is frequently encountered when the natural hazards (e.g., rockfalls, rockslides, and avalanches) occur in mountainous areas. To address progressive damage cracking characteristics upon impacting, this paper presents a three-dimensional finite-discrete method (3D-FDEM) study on complex process rock. influences impact velocity dynamic process, evolution, fragment characteristics, flying velocity, angle were systematically investigated. parameters as input for simulation first calibrated by 3D uniaxial compression tests rock-impact tests. Then, samples subjected to different velocities (i.e., 20–80 m/s) was simulated. numerical results show that number cohesive elements following shear-dominated failures gradually increases with increasing velocity. fractal can well describe distribution equivalent length, variations dimension are consistent ratio, Both average maximum fragments increase linearly However, shows sharp then slight
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ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2022
ISSN: ['2296-6463']
DOI: https://doi.org/10.3389/feart.2022.998521