CAE-based prediction of projectile residual velocity for impact on single and multi-layered metallic armour plates

Raguraman, M and Deb, A and Gupta, NK (2009) CAE-based prediction of projectile residual velocity for impact on single and multi-layered metallic armour plates. In: Latin American Journal of Solids and Structures, 6 (3). pp. 247-263.

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Abstract

The present, paper deals with the CAE-based study Of impact of jacketed projectiles on single- and multi-layered metal armour plates using LS-DYNA. The validation of finite element modelling procedure is mainly based on the mesh convergence study using both shell and solid elements for representing single-layered mild steel target plates. It, is shown that the proper choice of mesh density and the strain rate-dependent material properties are essential for all accurate prediction of projectile residual velocity. The modelling requirements are initially arrived at by correlating against test residual velocities for single-layered mild steel plates of different depths at impact velocities in the ran.-c of approximately 800-870 m/s. The efficacy of correlation is adjudged, in terms of a 'correlation index', defined in the paper: for which values close to unity are desirable. The experience gained for single-layered plates is next; used in simulating projectile impacts on multi-layered mild steel target plates and once again a high degree of correlation with experimental residual velocities is observed. The study is repeated for single- and multi-layered aluminium target plates with a similar level of success in test residual velocity prediction. TO the authors' best knowledge, the present comprehensive study shows in particular for the first time that, with a. proper modelling approach, LS-DYNA can be used with a great degree of confidence in designing perforation-resistant single and multi-layered metallic armour plates.

Item Type:	Journal Article
Publication:	Latin American Journal of Solids and Structures
Publisher:	Latin amer j solids structures
Additional Information:	copyright of this article belongs to Latin amer j solids structures.
Keywords:	single- and multi-layered plates, jacketed projectile, residual velocity, correlation index
Department/Centre:	Division of Mechanical Sciences > Centre for Product Design & Manufacturing
Date Deposited:	05 Mar 2010 08:14
Last Modified:	19 Sep 2010 05:56
URI:	http://eprints.iisc.ac.in/id/eprint/25945

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