Test and mesoscale numerical simulation for corundumaggregate ultra-high performance cementitious composites against projectile penetration

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (1) : 55-63.

GONG Jun1, WU Hao1, FANG Qin1, ZHANG Jinhua1, LIU Jianzhong2

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Abstract

The anti-penetration capability of concrete material is mainly dependent on its compressive strength and diameter and strength (hardness) of coarse aggregate. To develop a new type of concrete material being able to resist more intensive projectile impact loading, corundum pebbles with ultra-high strength and hardness were added, and corundumaggregate ultrahigh performance cementitious composites (CA-UHPCC) were prepared. The medium caliber projectile penetrating tests on CA-UHPCC with different coarse aggregate sizes (5~20mm, 35~45mm, 65~75mm) and high strength concrete (HSC) targets were conducted, and the test results were compared with the previous ones of basaltaggregate ultrahigh performance cementitious composites (BA-UHPCC) projectile penetrating tests. The higher anti-penetration capacity of CA-UHPCC than those of BA-UHPCC and HSC was validated. Furthermore, the 3D mesoscale finite element model of concrete considering random aggregate shapes and random spatial positions distribution as well as coarse aggregate/mortar interfacial transition zone was established. The numerical simulation of projectile impacts was conducted, and the effects of projectile velocity, coarse aggregate type and volumetric ratio on the anti-penetration capacity of concrete targets were analyzed. The results showed that the capacity of concrete targets against projectile penetration increases with increase in coarse aggregate strength (hardness), size and volumetric ratio; high strength (hardness) and large size (larger than 1.5 projectile diameter) coarse aggregate can cause abrasion and break of projectiles.

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ultra-high performance cementitious composites / corundum / penetration / mesoscale model / numerical simulation

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GONG Jun1, WU Hao1, FANG Qin1, ZHANG Jinhua1, LIU Jianzhong2. Test and mesoscale numerical simulation for corundumaggregate ultra-high performance cementitious composites against projectile penetration[J]. Journal of Vibration and Shock, 2017, 36(1): 55-63

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