Author(s)

A.M. Rajendran & D.J. Grove

Abstract

Aluminum oxide (AD995) is a leading candidate material in ceramic armor applications. The density of this material is 3.8 ~ 3.9 gm/cm^ with a porosity of about 2 percent. Its bulk and shear moduli are 231 and 156 GPa, respectively. From microscopic studies on recovered ceramic specimens from impact and penetration experiments, it has been established that the deformation under shock and impact loading is due to microcracking, microplasticity, pore collapse, and twinning. Rajendran [1] formulated a constitutive model to describe the stress-strain response of ceramics based on these various deformation modes. The Rajendran-Grove (RG) model has been implemented in the 1995 version of the EPIC code [2]. The shock response of AD995 is modeled through EPIC simulations of 1) planar plate impact at velocities below and ab

Keywords