Progressive fracturing of concrete under biaxial confinement and repetitive dynamic loadings: From damage to catastrophic failure

Wang, Huachuan; Zhao, Jiateng; Li, J; Braithwaite, Christopher; Zhang, Qianbing

doi:10.1016/j.ijimpeng.2022.104232

Cited by 12 publications

(1 citation statement)

References 69 publications

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“…Wu 32 utilized SHPB to discern the dynamic tensile strength variations of pre-tensioned rocks, with Zhao 33 focusing on the fractal traits of coal-bearing seam crack extensions under similar conditions. Li 34 entailed introducing radial restraints in SHPB specimens to enhance the compressive strength of concrete-like samples, and Wang 35 explored the mechanical properties and progressive fracturing of concrete materials under biaxial confinement and repetitive dynamic loads. Xie 36 ventured into examining the effects of disparate strain rates on the dynamic compression characteristics, energy dissipation, and fragmentation morphology of Basalt Fiber Reinforced Concrete (BFRC).…”

Section: Introductionmentioning

confidence: 99%

An analysis of impact load and fragmentation dimension to explore energy dissipation patterns in coal crushing

Wang,

Jing,

Zhang

et al. 2023

Sci Rep

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This research delineates the energy dissipation characteristics in coal crushing under impact loads, leveraging the capabilities of Separated Hopkinson Pressure Bar experimental system. A meticulous examination of both burst-prone and non-burst-prone coal samples during destruction processes was undertaken to decipher the dynamic compression mechanical attributes from perspectives of energy and fragmentatio‘s fractal dimensions. Burst-prone coal showcases a more pronounced escalation in fragmentation work in comparison to non-burst-prone samples, thereby illustrating a perceptible strain-rate dependent effect correlating with enhanced strain rates. Additionally, it was observed that incident, reflected, and transmitted energy trajectories for both sample categories follow an approximately linear ascendancy, albeit exhibiting diverse magnitudes. Burst-prone coal manifests a more rapid and focused energy growth compared to its non-burst-prone counterpart. When subjected to impact loads, a notable trend was discerned where the fragmentation’s fractional dimension escalated persistently with both the incident energy and the crushing work, portraying a prominent growth effect. The insights garnered from this study pave the way for distinguishing between impacted and unimpacted coal samples using energy perspectives and fragmentation's fractal dimensions.

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