9. Fabrication and Simulation of Random and Periodic Macrostructures

  1. Jeffrey J. Swab
  1. R. McCuiston1,
  2. E. Azriel1,
  3. R. Sadangi1,
  4. S. Danforth1,
  5. R. Haber1,
  6. D. Niesz1 and
  7. J. Molinari2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291276.ch9

Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7

Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7

How to Cite

McCuiston, R., Azriel, E., Sadangi, R., Danforth, S., Haber, R., Niesz, D. and Molinari, J. (2005) Fabrication and Simulation of Random and Periodic Macrostructures, in Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida, Ceramic Engineering and Science Proceedings, Volume 26, Number 7 (ed J. J. Swab), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291276.ch9

Author Information

  1. 1

    Rutgers University, Department of Ceramic Engineering 607 Taylor Road Piscataway, NJ, 08854

  2. 2

    Johns Hopkins University, Department of Mechanical Engineering 3400 North Charles Street Baltimore, MD, 21218

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982374

Online ISBN: 9780470291276

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Keywords:

  • monolithic parent materials;
  • shockwave propagation;
  • grady;
  • equilibrium thermodynamic path;
  • scattering mechanism theory

Summary

Shock wave propagation during an impact event can nucleate and grow strength limiting defects in an armor material before the penetration process. By limiting shock wave propagation before the penetration process an improvement in armor performance may be realized. Recent studies on phononic band gap structures have shown it is possible to create stop bands in which wave propagation is forbidden. This study will address the feasibility of applying concepts of phononic band gap structures to shock wave propagation during an impact event Macrostructures comprised of an Al2O3 matrix containing discrete WC-Co inclusions have been fabricated using tape casting and lamination. The millimeter scale WC-Co inclusions were placed in the Al2O3 matrix in either a random or periodic fashion. After binder removal and sintering, samples were characterized using optical and electron microscopy. Vickers indentation was used to determine the hardness of, as well as the bond quality between the two materials. Through transmission acoustic characterization evaluated low amplitude wave propagation. Results show that the Al2O3 / WC-Co system is feasible for the fabrication of macrostructures. A series of 2D finite element simulations were used to study high amplitude shock wave propagation. The effect of WC-Co inclusion size, volume percentage and structure were studied under various loading conditions. Simulations indicate that shock wave propagation in the macrostructures can be significantly altered when compared with either of the monolithic parent materials.