Effect of coarse aggregate type on the residual velocity of rigid projectileperforating concrete target

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (7) : 170-173.

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Effect of coarse aggregate type on the residual velocity of rigid projectileperforating concrete target

ZHANG Zhao-jun WANG Xiao-ming LI Wen-bin

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Abstract

On the study of projectile perforating concrete target, mesoscale model is able to describe the effect of various mediums on the concrete mechanical properties. Algorithms for generating and distributing random 3D sphere coarse aggregate were proposed. The 3D finite element mesoscale concrete model, which consists of mortar matrix and coarse aggregate, was established based on the theory of background element and material identification. The interfacial transition zone was simplified as a kind of contact between elements. Based on this model, continuous finite element code was used to simulate the process of rigid projectiles perforating concrete targets and the effect of 3 different coarse aggregate on residual velocities was analyzed. This work indicate that the strength and density of coarse aggregate affects the residual velocity under lower and higher impact velocity respectively.

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concrete / residual velocity / mesoscale model / aggregate / numerical simulation

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ZHANG Zhao-jun WANG Xiao-ming LI Wen-bin. Effect of coarse aggregate type on the residual velocity of rigid projectileperforating concrete target[J]. Journal of Vibration and Shock, 2014, 33(7): 170-173