Study on Impact Dynamic Response and Energy Evolution Characteristics of Coal–Rock Composites
Source abstract
Abstract
To elucidate the dynamic impact response mechanism and energy evolution principles of coal–rock composites, dynamic impact tests were conducted on coal–medium sandstone and medium sandstone–medium sandstone composites at varying impact velocities utilizing a split Hopkinson pressure bar (SHPB) test system. The failure modes of the specimens, characteristics of stress wave propagation, dynamic stress–strain correlations, and energy dissipation properties were extensively analyzed. The results indicate that, when impact velocity increases, the failure mechanism of the composites shifts from shear slip to crushing failure. The dynamic response demonstrates a pronounced strain rate impact, and the failure energy threshold significantly escalates.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · High-Velocity Impact and Material Behavior · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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Show source-provided references
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