钙质砂动态力学特性试验研究

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摘要利用改进的直径37mm分离式霍普金森铝制压杆,对级配相同的钙质砂与福建标准砂开展了35组被动围压冲击试验，研究了应变率和密度对两种砂动态力学特性的影响。结果表明：两种砂在本文应变率范围内基本没有应变率效应；密实度相同时，石英砂的承载力远大于钙质砂；应变相同时，初始密度越大，砂的承载力越大。在荷载作用下，砂的静水压力p与密度存在一一对应关系，拟合出了钙质砂的p-(/0)物态方程，并得到在一维应变条件下钙质砂p-v的方程。

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	魏久淇1
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	王明洋1
	邱艳宇1
	赵章泳1

关键词 ：钙质砂, 石英砂, SHPB, 应变率效应, 物态方程

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

收稿日期: 2018-01-06 出版日期: 2018-12-15

引用本文:

魏久淇1,2,3，王明洋1，邱艳宇1，赵章泳1. 钙质砂动态力学特性试验研究[J]. 振动与冲击, 2018, 37(24): 7-12.
WEI Jiuqi1,2,3,WANG Mingyang1,QIU Yanyu1,ZHAO Zhangyong1. Impact compressive response of calcareous sand. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(24): 7-12.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I24/7

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