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

LUO Yinjian,LI Xiudi,CAI Tao,YANG Jinhong

Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (4) : 19-27.

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (4) : 19-27.

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

  • LUO Yinjian,LI Xiudi,CAI Tao,YANG Jinhong
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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.

Key words

engineered cementitious composite(ECC) / impact compression / energy consumption / split Hopkinson pressure bar (SHPB);destructive form

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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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