Damage effects of explosion of shelled explosive in concrete

The damage of concrete subjected to explosion loading is an important issue in defence engineering. The degree of damage to concrete is related to many factors, such as type of explosive charge, depth of burial, and parameters of concrete. In this study, three factors have been considered for experiments of shelled explosives in concrete targets, which are filling coefficient, length-to-diameter ratio, and depth of burial. The filling coefficient is from 0.1 to 1.0 by changing thickness of shell, and the length-to-diameter ratio is from 2.5. The unconfined compressive strength of concrete targets for test is 35 MPa. The experimental results showed that sizes of craters of concretes were varied depending upon the filling coefficient, the length-todiameter ratio, and the depth of burial. The optimal values of filling coefficient, length-to-diameter ratio, and depth of burial of shelled charges have been obtained to get maximal damage regions of concrete targets. This study has provided a base for evaluating damage of concrete and designing penetrating warhead.