脆性材料水泥砂浆多轴应力下的动态响应分析

李英华; 杨黎明; 汤立群; 刘逸平; 魏志强

振动与冲击 ›› 2011, Vol. 30 ›› Issue (10) : 216-220.

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (10) : 216-220.
论文

脆性材料水泥砂浆多轴应力下的动态响应分析

  • 李英华1; 杨黎明2; 汤立群1; 刘逸平1; 魏志强1
作者信息 +

Analysis of dynamic response of brittle material cement mortar under multi-axial stress

  • LI Ying-hua1; YANG Li-ming2; TANG Li-qun1; LIU Yu-ping1; WEI Zhi-qiang1
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摘要

在实际的结构应用中,混凝土类材料一般处于复杂工作应力状态,且可能承受动态荷载的作用。据此,本文采用Instron3421液压伺服试验机和具有主动围压加压装置的SHPB研究了混凝土材料-砂浆宽应变率范围多轴应力下的动态力学行为;基于Johnson-Cook强度模型框架,确定了等效强度模型的率相关参数及其他材料常数;提出了适用于描述主动围压下砂浆受冲击荷载的损伤演化规律,并确定了损伤演化常数,实验数据与理论值吻合较好

Abstract

Concrete materials used in structures generally work in state of complex stress and may bear dynamic load. So, Instron Servo-hyduaulic testing system and SHPB with confining pressure device are used in this article to investigate into the dynamic mechanical behavior of concrete material-mortar under multi-axial stress state in a wide range of strain rate; according to equivalent strength model, the strain rate coefficient and related material constants of mortar are determined experimentally; the damage evolution law of mortar under SHPB impact with confining pressure is suggested and the damage evolution parameters are determined by experiments. The experimental data are in good agreement with the theoretical values.

关键词

水泥砂浆 / SHPB / 主动围压 / 等效强度模型 / 损伤演化

Key words

cement mortar / SHPB / confining pressure / equivalent strength model / damage evolution

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李英华; 杨黎明; 汤立群; 刘逸平; 魏志强. 脆性材料水泥砂浆多轴应力下的动态响应分析[J]. 振动与冲击, 2011, 30(10): 216-220
LI Ying-hua; YANG Li-ming;TANG Li-qun;LIU Yu-ping;WEI Zhi-qiang. Analysis of dynamic response of brittle material cement mortar under multi-axial stress[J]. Journal of Vibration and Shock, 2011, 30(10): 216-220

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