Three-dimensional mesoscopic investigation on equation of state for dry sand under shock compression

Li, Haoyang; Kong, Xiangzhen; Fang, Qin; Hong, Jung‐Wuk; Peng, Yong

doi:10.1016/j.ijimpeng.2021.104060

Cited by 2 publications

(1 citation statement)

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“…Granular materials, characterized by their wide availability and stable physical properties, exhibit unique mechanical characteristics 1 , 2 . Granular materials have long been used as energy-absorbing or cushion device for absorbing external energy, enhancing load-bearing stability and mitigating shock waves through elastic–plastic deformation, particle collisions, friction, and fragmentation 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study of energy‑absorbing and support characteristics of glass microsphere-filled steel tube columns under uniaxial compression

Ma,

Sun,

Liu

et al. 2024

Sci Rep

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An innovative energy-absorbing and bearing structure was proposed, which incorporated the coupling of glass microspheres with a metal tube. Glass microsphere-filled steel tube (GMFST) column, consisting of external steel tube and inner glass microspheres, was expected to give full play to the energy-absorbing and load-bearing capacities of the particle while restricting particle flow from collapsing, thereby enhancing the overall structural strength. Four groups of steel tubes and the GMFST specimens were designed and subjected to axial compression tests at four different loading rates to investigate the performance of the structure. These tests aimed to analyze the deformation mode, mechanical response, and energy absorption capacity of the GMFST columns under quasi-static to low-speed compression conditions. The results indicated that the deformation process and failure mode of GMFST columns were similar to those of hollow steel tubes, albeit with a different post-buckling mode. Filling the steel tubes with glass microspheres reduced the load fluctuation range, moderated load–displacement curves, and exhibited a strain rate strengthening effect. The GMFST columns demonstrated superior energy absorption capacity, with significant increases in crush force efficiency, the averaged crush force, and the total absorbed energy, particularly in terms of subsequent support capacity. The load-increasing reinforcement properties enabled GMFST columns to overcome the limitations associated with the unstable post-buckling path of energy‑absorbing damping structure, exhibiting outstanding load-bearing performance and stability in the later stages. The results provided valuable guidelines for designing and engineering high-performance GMFST columns, serving as a new type of energy-absorbing and supporting structure.

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