ECC冲击压缩力学特性及耗能机制的试验研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (4) : 19-27.

论文

罗银剑，李秀地，蔡涛，杨谨鸿

作者信息 +

An experimental study on the mechanical properties of shock compression and energy consumption mechanism of ECC

LUO Yinjian，LI Xiudi，CAI Tao，YANG Jinhong

Author information +

文章历史 +

摘要

基于分离式霍普金森压杆(split Hopkinson pressure bar, SHPB)装置对工程水泥基复合材料（Engineered cementitious composite，以下简称ECC）在14.8~16.3 s-1、31.8~36.5 s-1、57.8~65.5 s-1、167.3~200.2 s-1四个应变率范围下进行冲击压缩试验，探究ECC在不同应变率下的动态力学特性及耗能机制。试验表明，ECC的动态抗压强度和动态峰值应变呈现出显著的应变率增强效应，在低应变率下纤维掺量对ECC动态抗压强度和峰值应变的增加作用较强，在高应变率增强作用不明显；纤维掺量对ECC在不同应变率的应力应变曲线具有类似的影响，在低应变率下纤维掺量的对ECC应力应变曲线形态的影响大于高应变率；ECC的耗能能力与破坏形态有关，在能耗比达到90%以上时，纤维掺量为2.0%和2.3%的ECC的完整度是基体材料的4倍，充分体现了ECC在抗爆加固领域的优势，为ECC在抗爆抗冲击领域的应用提供技术参考。

Abstract

Based on the isolated SHPB device, the engineered cementitious composite were tested for impact compression in the range of 4 strain rates from 14.8 to 16.3 s-1,31.8 to 36.5 s-1,57.8 to 65.5 s-1,167.3 to 200.2 s-1 to explore the dynamic mechanical characteristics and energy consumption mechanism of ECC at different strain rates.The test showed that The dynamic compressive strength and the dynamic peak strain of the ECC showed a significant strain rate enhancement effect, The increase of the dynamic compressive strength and peak strain of ECC at low strain rate, The effect of the enhancement at the high strain rate is not obvious; Fiber incorporation had similar effects on the stress strain curves of the ECC at different strain rates, The effect of fiber incorporation at the low strain rate on the ECC stress strain curve morphology was greater than on the high strain rate; The energy consumption capacity of the ECC is associated with the destructive morphology, When the energy consumption ratio exceeds 90%, The ECC with a fiber incorporation of 2.0% and 2.3% was 4 times more complete than that of the matrix material, It fully reflects the advantages of ECC in the field of anti-explosion reinforcement, It provides technical reference for ECC in the field of explosion resistance and impact resistance.

导出引用

罗银剑，李秀地，蔡涛，杨谨鸿. ECC冲击压缩力学特性及耗能机制的试验研究[J]. 振动与冲击, 2023, 42(4): 19-27

LUO Yinjian，LI Xiudi，CAI Tao，YANG Jinhong. An experimental study on the mechanical properties of shock compression and energy consumption mechanism of ECC[J]. Journal of Vibration and Shock, 2023, 42(4): 19-27

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