Author(s)

D.R. Scheffler & L.S. Magness, Jr.

Abstract

This study examines the effect of the target constitutive model on the ability of the CTH hydrocode to predict the effect of rod nose-shape on the transition from rigid body to eroding rod penetration for tungsten alloy long rods perforating finite 7039 aluminum targets. Two rod nose shapes and three target constitutive models are examined. The rod nose-shapes were hemispherical and ogival and the target constitutive models include the Johnson-Cook model, the modified Johnson-Cook model, and the Zerilli-Armstrong model. Results are compared with an experimental study that delineated the effect of nose shape on the threshold velocity at which tungsten alloy penetrators transition from

Keywords