30. Analysis of Firing and Fabrication Stresses and Failure in Ceramic-Lined Cannon Tubes

  1. Manuel E. Brito,
  2. Peter Filip,
  3. Charles Lewinsohn,
  4. Ali Sayir,
  5. Mark Opeka and
  6. William M. Mullins
  1. J. H. Underwood1,
  2. M. E. Todaro1,
  3. M. D. Witherell1 and
  4. A. P. Parker2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291283.ch30

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

How to Cite

Underwood, J. H., Todaro, M. E., Witherell, M. D. and Parker, A. P. (2005) Analysis of Firing and Fabrication Stresses and Failure in Ceramic-Lined Cannon Tubes, in Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8 (eds M. E. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka and W. M. Mullins), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291283.ch30

Author Information

  1. 1

    US Army Armament Engineering and Technology Center Watervliet, NY 12189, USA

  2. 2

    Royal Military College of Science, Cranfield University Swindon, SN6 8LA, UK

Publication History

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

ISBN Information

Print ISBN: 9781574982619

Online ISBN: 9780470291283

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Keywords:

  • cetamics;
  • carbon;
  • mechanics;
  • chromium;
  • temperatures

Summary

Four aspects of service loading of ceramic lined cannons are considered, based upon recent work with ceramics under cannon thermomechanical loads and upon experience with cannons made from more conventional materials. First, candidate ceramics are evaluated by comparing models of thermal compressive firing stress with their measured compressive strength at elevated temperatures. The strength of each of the ceramics exceeds typical near-bore firing stress, with SiAlON having more margin between high temperature strength and near-bore firing stress than SiC and Si3N4. Second, an upper bound analysis is performed of the shear failure of a typical ceramic “island” created by thermal cracks and subjected to further compressive firing stress. The analysis shows that failure of cracked ceramic islands is possible. Third, a generic design concept of a thin ceramic liner is considered, supported by a thicker, intermediate, shrink-fitted, steel liner, and further supported by a shrink-fitted steel or tension-wrapped carbon fiber/epoxy jacket. Radial and hoop fabrication and firing stresses are calculated and axial fabrication stresses are estimated for typical cannon steel and composite properties, showing radial crushing of composites to be a concern. Fourth, a fracture mechanics analysis is used to calculate the cannon firing pressure at which a thermal crack would grow to full depth of the ceramic liner. The low fracture toughness of SiC is a limitation.