DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1707 - 1713
Section Numerical Simulations
Published online 15 September 2009
DYMAT 2009 (2009) 1707-1713
DOI: 10.1051/dymat/2009241

Numerical procedure for the prediction of projectile residual velocity for impact on mild steel plates

R. Munusamy1, A. Deb2 and D. C. Barton1

1  School of Mechanical Engineering, University of Leeds, UK
2  Centre for Product Design and Manufacturing, Indian Institute of Science, Bangalore, India

Published online: 15 September 2009

The present paper deals with the development of a numerical procedure for the prediction of residual velocities of hard core ogival-nose projectiles normally impacting on mild steel target plates. The finite element modelling criteria are arrived at through a mesh convergence study by successively refining shell elements used for representing target plates. For generality, jacketed projectiles with a copper sheath and a hardened steel core are modelled with solid elements. The simulations are carried out with the explicit contact-impact LS-DYNA solver by employing a tabular strain rate-dependent constitutive model for the target plate. It is shown that the proper choice of mesh density is crucial for obtaining test-compatible residual velocity. The present approach of material modelling which captures the effects of strain rates on yield and failure stresses as well as failure strain is compared against strain rate-dependent modelling using the well-known Cowper-Symond relation. It is shown that the predictions using two different material models are found to be very similar to each other for the same target material. Additionally, the benchmarked modelling procedure is applied to computation of ballistic limits and studying the effect of plate thickness on projectile residual velocity.

© EDP Sciences 2009