Chapter 24. A Physically-Based Model for the Effect of Microstructure and Mechanical Properties on Ballistic Performance

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. J.C. Lasalvia

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch24

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Lasalvia, J.C. (2002) A Physically-Based Model for the Effect of Microstructure and Mechanical Properties on Ballistic Performance, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch24

Author Information

  1. U.S. Army Research Laboratory Aberdeen Proving Ground, MD 21005–5069

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • mechanisms;
  • micromechanics;
  • frictionless;
  • ceramic;
  • velocity

Summary

Recovery of ceramics from ballistic experiments in which impacting ductile long-rod projectiles failed to penetrate has led to the observation and understanding of the localized damage mechanisms beneath the region of impact. The shape of the damaged region indicates that these mechanisms are shear-assisted. Based upon these observations, a model for the transition between no penetration and penetration was formulated by combining a micromechanics -based compressive failure model with Hertz's theory for frictionless contact between axisymmetric linear-elastic bodies. The resulting model indicates the relative significance of a ceramic's grain size, short-crack fracture toughness, yield strength, Poisson's ratio, coefficient of friction, and critical crack-length on the dwell/penetration transition. A brief review of the derivation and predictions of the model are presented.