| 冲击载荷下混凝土材料的动态本构关系 |
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| 引用本文： | 胡时胜,王道荣.冲击载荷下混凝土材料的动态本构关系[J].爆炸与冲击,2002,22(3):242-246. |
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| 作者姓名： | 胡时胜 王道荣 |
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| 作者单位： | 1. 中物院流体物理研究所冲击波物理与爆轰物理实验室,四川,绵阳,621900;中国科学技术大学力学和机械工程系,安徽,合肥,230027
2. 中国科学技术大学力学和机械工程系,安徽,合肥,230027 |
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| 基金项目： | 国防重点实验室基金;97JS75,2,2,ZK0102; |
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| 摘 要： | 利用改装的杆径为 74mm的直锥变截面式大尺寸Hopkinson压杆对混凝土材料进行冲击压缩实验 ,系统研究了混凝土的应变率硬化效应 ,采用一种新的方法损伤冻结法对混凝土材料在冲击载荷下的损伤软化效应进行了系统研究 ,给出了冲击载荷下混凝土的损伤演化方程 ;在对数据进行合理分析的基础上 ,结合粘弹性本构理论 ,得到混凝土材料的损伤型线性粘弹性本构关系。
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| 关 键 词： | 混凝土材料 Hopkinson压杆 动态本构关系 |
| 文章编号： | 1001-1455(2002)03-0242-05 |
| 修稿时间： | 2001年4月23日 |
Dynamic Constitutive Relation of Concrete under Impact |
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| HU Shi sheng ,WANG Dao rong.Dynamic Constitutive Relation of Concrete under Impact[J].Explosion and Shock Waves,2002,22(3):242-246. |
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| Authors: | HU Shi sheng WANG Dao rong |
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| Institution: | HU Shi sheng 1,2,WANG Dao rong 2 |
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| Abstract: | Constitutive properties of concrete under dynamic loading play an important role in the analysis of concrete structures subject to impact loading.There are many defects such as micro crack and micro void inside the concrete material.Damage softening has a great influence on the mechanic behavior of concrete under impact.So a new experiment method called "freezing in "damage test is used to obtain the damage evolution equation.The impact compression tests are performed with a modified right cone 74 mm diameter SHPB.The results of experiments show both strain rate stiffening effects and the damage softening effects.Based on ZWT visco elasticity model a linear visco elasticity according to damage evolution constitutive relation of concrete is obtained. |
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| Keywords: | concrete split Hopkinson pressure bar dynamic constitutive relation |
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