轻质泡沫混凝土SHPB试验与分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (17) : 116-119.

论文

轻质泡沫混凝土SHPB试验与分析

袁璞，马芹永，张海东

作者信息 +

Split Hopkinson pressure bar tests on light weight foam concrete

Yuan Pu，Ma Qin-yong，Zhang Hai-dong

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文章历史 +

摘要

为研究轻质泡沫混凝土的冲击动力学性能，结合半导体应变测试技术和入射脉冲整形技术对铝质分离式Hopkinson压杆（SHPB）装置进行改进，解决了泡沫混凝土类多孔介质材料透射信号难采集问题，满足了加载过程中试件内部应力均匀性要求。通过调整冲击气压对密度为220 kg/m3轻质泡沫混凝土实施了不同撞击杆速度下的单轴冲击压缩试验。试验结果表明，泡沫混凝土试件在冲击荷载作用下依次经历线弹性阶段、屈服阶段和孔壁破坏3个阶段，且泡沫混凝土试件平均应变率与撞击杆速度表现出较强的线性相关性。

Abstract

In order to investigate the impact dynamic properties of light-weight foam concrete, semiconductor strain test technology and incident pulse shaping technique are adopted to modify the aluminium split Hopkinson pressure bar apparatus to make it suitable for low impedance porous materials. Then the problems, difficult in collecting transmitted signal, are solved by semiconductor strain test technology and the internal stress uniformity requirements in loading process are also met by incident pulse shaping technique. Uniaxial impact compression tests in various striker velocities are conducted by changing the pressure of the compressed gas for light-weight foam concrete with density of 220 kg/m3. And the test results show that under impact loads the foam concrete specimens go through 3 stages, linear elastic stage, yield stage and pore compaction stage. Moreover, there is a strong linear correlation between the average strain rate of foam concrete specimens and the striker velocity.

导出引用

袁璞;马芹永;张海东. 轻质泡沫混凝土SHPB试验与分析[J]. 振动与冲击, 2014, 33(17): 116-119

Yuan Pu;Ma Qin-yong;Zhang Hai-dong. Split Hopkinson pressure bar tests on light weight foam concrete[J]. Journal of Vibration and Shock, 2014, 33(17): 116-119