Dynamic Features Experiment of Hollow Corundum Ball Concrete

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (12) : 110-116.

LU Song1，XU Jin-yu1,2，LUO Xin1，DONG Zongge3，WANG Hongwei4

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Abstract

The dynamic compressive experiments of Hollow Corundum Ball Concrete (HCBC) and Plain Concrete (PC), under different stain rate, are made by using a 100-mm-diameter split Hopkinson pressure bar apparatus. The relationship between dynamic compressive strength with strain rate is studied, so does the critical strain. The dynamic evolution rule of HCBC and PC is analyzed with the loss vector of dissipation of material constitutive energy. The results show that the stress versus strain curves exhibits apparently three stages: elastic; platform; density. This performance of HCBC is more obvious than that of PC. The brittleness of HCBC is small and the toughness is large. The dynamic compressive strength and critical stain increase with the increase of strain rate, and the experiment relation is given. The results demonstrate HCBC is reinforce and toughing material obvious correlation with strain rate. The evolution development of HCBC and PC can be divided into three stages: no damage development, stable damage development and unstable damage development. The threshold of damage-strain and damage has no relationship with change of strain rate, and the maximum threshold of damage-stress and damage increases with the increase of stain rate. The threshold of damage-stress of HCBC is lower than PC, which demonstrates the toughness is better than PC’s. The results can be theory guider for HCBC to be used for military defensive engineering’s distribution layer.

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hollow corundum ball concrete / SHPB / dynamic compressive strength / critical strain / damage development

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LU Song1，XU Jin-yu1,2，LUO Xin1，DONG Zongge3，WANG Hongwei4. Dynamic Features Experiment of Hollow Corundum Ball Concrete[J]. Journal of Vibration and Shock, 2016, 35(12): 110-116

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