A SPHERICAL CAVITY-EXPANSION PENETRATION MODEL FOR CONCRETE TARGETS

We developed a spherical, cavity-expansion penetration model for concr ete targets. Target constitutive-descriptions idealized pressure-volum etric strain as incompressible or linear compressible and idealized sh ear strength-pressure as Mohr-Coulomb with a tension cutoff. We showed these idealized material descriptions were reasonable approximations to triaxial material data. Predictions from the compressible penetrati on model are in good agreement with depth of penetration data for a 30 .5-mm-diameter, 1.60 kg, ogive-nose, rod projectile for striking veloc ities to 1100 m/s. (C) 1997 Elsevier Science Ltd.