The composite damage effects of explosion after penetration in plain concrete targets

摘要

To investigate the composite damage effects of explosion based on initial damage caused by penetration, a series of penetration and explosion tests were conducted on plain concrete at different impact velocities, charge masses, and charge locations. Before that, a dimensional analysis of explosion effects after penetration in a concrete slab was undertaken, in which the composite damage effects can be characterized by a dimensionless explosion coefficient and a dimensionless impact coefficient. In addition, the initial damage caused by penetration can be characterized by the dimensionless impact coefficient. Based on the experimental data and theoretical analysis, the physical relationships between the composite damage effects of explosion and the initial damage effects of penetration were revealed, and the regression equation of the final crater depth and radius caused by explosion was obtained, which is described by the dimensionless impact coefficient and the dimensionless explosion coefficient.