Chapter 8. Method for Reinforcing Threads in Multilayer Composite Tubes and Cylindrical Structures

  1. John B. Wachtman Jr.
  1. G. R. Romanoski and
  2. T. D. Burchell

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314876.ch8

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

How to Cite

Romanoski, G. R. and Burchell, T. D. (1996) Method for Reinforcing Threads in Multilayer Composite Tubes and Cylindrical Structures, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314876.ch8

Author Information

  1. Oak Ridge National Laboratory P.O. Box 2008 Oak Ridge, Tennessee 37831-6088

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375433

Online ISBN: 9780470314876

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Keywords:

  • multilayer techniques;
  • tape wrapping;
  • filament winding;
  • fabricating composite tubes;
  • radial reinforcement

Summary

Multilayer techniques such as: tape wrapping, braiding, and filament winding represent versatile and economical routes for fabricating composite tubes and cylindrical structures. However, multilayer architectures lack the radial reinforcement required to retain threads when the desired means of connection or closure is a threaded joint. This issue was addressed in the development of a filament wound, carbon-carbon composite impact shell for the NASA radioisotope thermoelectric generator. The problem of poor thread shear strength was solved by incorporating a number of radial elements of triangular geometry around the circumference of the thread for the full length of thread engagement. The radial elements significantly increased the shear strength of the threaded joint by transmitting the applied force to the balance of composite structure. This approach is also applicable to ceramic composites.