混凝土SHPB试验的数值模拟  

NUMERICAL SIMULATION OF SHPB TEST OF CONCRETE

作　　者：焦楚杰[1] 李祯[1] 高乐[1] 

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《工程力学》2010年第A02期196-200,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(50708022);广东省自然科学基金项目(06301038);建设部科研开发项目(06-K1-37;07-K4-5;07-K4-13;10-K3-27);广州市属高校科技计划项目(62064);广州大学科研创新团队项目(2008-2009)

摘　　要：利用有限元分析软件LS-DYNA对混凝土的分离式霍普金森压杆(SHPB)冲击压缩过程进行了数值模拟,再现了混凝土试件在冲击试验过程中的应力波形、应力波震荡现象、应力-应变曲线以及试件的破坏过程,模拟结果与试验实测结果具有较好的类似性。模拟研究还发现:在SHPB冲击试验的过程中,混凝土试件内部应力波经历了多次来回震荡后近似稳定,混凝土试件的破坏稍微滞后于应力峰值,混凝土试件的破坏是从周边脱落开始,最后发展到试件中间。The stress wave shape,stress variation,stress-strain curves and the destruction process of concrete specimens during the split Hopkinson pressure bar（SHPB） test were simulated under an impact compression load using the finite element analysis software LS-DYNA.The simulation results were similar to the experiment results.The simulation results showed that the stress waves of the concrete specimens experienced a round vibration prior to approximate stability during the SHPB test and that the concrete specimens were destroyed slightly behind the maximum stress.It was also found that the concrete specimens were destroyed initially from the edge and finally to the center.

关 键 词：混凝土 SHPB 冲击压缩 数值模拟 应力 应变 

分 类 号：TU377[建筑科学—结构工程] TU313