Study on Shaped Charge Jet Impact and Penetration into High and Ultra-High Strength Reactive Powder Concrete Targets

Abstract

Reactive powder concrete (RPC), a composite that is cured to have ultra-high compressive strength, high durability and high toughness, has been developed in recent years. In this study, the penetration model as shaped charge jet (SCJ) into RPC targets was investigated. The penetration resistance and the anti-impact performance of RPC targets were analyzed. Restlts showed that depth of penetration (DOP) experiments had a good agreement with the calculations. The DOPs of RPC targets created by shaped charge jets are more sensitive to the compressive strength than cavity diameters. In addition, the effect of the jet velocity on penetration resistance was significantly greater than concrete strength do. The higher the jet velocity was, the smaller the compressive strength affected the penetration resistance. With the increase of the RPC compressive strength, the increase of the penetration resistance showed a gradual downtrend. The incrementary ratio of the penetration resistance with the increasing RPC compressive strength was smaller when the jet velocity range was 5.0~10.0km/s compared with that when 1.0~5.0km/s. Moreover, the impact crater depth is affected more by compressive strength of concrete than that by steel fiber volume fraction. The area of the impact crater is no longer reduced as the volume fraction of steel fiber is more than 2% (compressive strength is more than 180MPa), while the depth and volume of impact crater are still decreasing.