摘要
讨论了玻璃纤维/环氧树脂复合材料(Glass Fiber Reinforced Plastic,GFRP)增强 Q235圆钢管在低速冲击荷载作用下的应变率效应。通过轴压试验和轴向低速冲击试验获得了试件在准静态和低速冲击状态下的力学响应(轴向荷载及轴向位移),为后续仿真工作提供了依据。编写了可以考虑初始失效、损伤演化及应变率效应的 GFRP材料子程序(VUMAT),并基于ABAQUS 对构件的轴压及轴向冲击过程进行了仿真再现。通过仿真将不考虑应变率效应、只考虑钢管应变率效应、只考虑 GFRP 应变率效应、考虑钢管及 GFRP 应变率效应 4 种情况下的结果进行了对比分析。
This paper discussed the strain rate effect of glass fiber/epoxy resin composite (GFRP)-reinforced Q235 circular steel tube under low-velocity impact load. Firstly, the responses (axial load and displacement) of GFRP-reinforced steel tube under quasi-static and low-velocity impact load were obtained through axial compression tests and low-velocity impact tests respectively, which provided gist for the subsequent simulation. Secondly, a VUMAT subroutine considered initial failure modes, damage evolution and strain rate effect of GFRP was introduced;then the axial compression and low-velocity impact processes were simulated. Finally, the results under 4 situations (ignoring strain rate effect, considering the strain rate effect of steel tube, considering the strain rate effect of GFRP and considering the strain rate effect of both steel tube and GFRP) was compared using simulation.
作者
武启剑
支旭东
WU Qijian;ZHI Xudong(Key Laboratory of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology, Harbin 150090, China;Key Laboratory of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry andInformation Technology, Harbin Institute of Technology, Harbin 150090, China)
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2019年第4期112-121,共10页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(51478144)
