Impact compressive response of calcareous sand

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (24) : 7-12.

WEI Jiuqi1,2,3,WANG Mingyang1,QIU Yanyu1,ZHAO Zhangyong1

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Abstract

A total of 35 dynamic tests performed on the modified split Hopkinson pressure bar (SHPB) was used to investigate the effect of strain rate and density on the dynamic responses of calcareous sand and Fujian standard sand with the same particle size distribution.The results show that the two sorts of sand almost have no strain rate effect within the strain rate range conducted in this paper.Furthermore, the bearing capacity of quartz sand is much larger than the calcareous sand with the same relative density.When strains of specimens are the same, the bearing capacity increases with larger initial density.Under the effect of loading, the hydrostatic stress p and density ρ of sands have one to one mapping relationship.The state equation p-(ρ/ρ0) of calcareous sand and the relationship between hydrostatic stress p and volumetric strain εv were obtained.

Key words

calcareous sand / quartz sand / SHPB / strain rate effect / state equation

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WEI Jiuqi1,2,3,WANG Mingyang1,QIU Yanyu1,ZHAO Zhangyong1. Impact compressive response of calcareous sand[J]. Journal of Vibration and Shock, 2018, 37(24): 7-12

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