Evaluation of Composite Curing Stresses

  • N. J. Pagano
  • H. T. Hahn
Part of the Solid Mechanics and Its Applications book series (SMIA, volume 34)


A recently developed approach to predict the initial stress field within a composite laminate after fabrication processing is examined in some detail. In this approach, the material response is assumed to be elastic with temperature-dependent properties. With the introduction of the concept of a stress-free temperature, it is shown that this position is defensible by use of deformation measurements on unsymmetric angle-ply units. Implications concerning the influence of the curing stress field on initial damage level (first-ply failure) are studied analytically. The predictions indicate a marked effect of curing stress in certain laminates. The consequences of combined moisture and thermal effects on initial damage level also are discussed.

Key Words

composite materials laminates stresses deformation measurement residual stress 


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  1. [1]
    Doner, D. R. and Novak, R. C., “Structural Behavior of Laminated Graphite Filament Composites,” Paper No. 2-D, 24th Annual Technical Conference, The Society of Plastics Industry, 1969.Google Scholar
  2. [2]
    Pagano, N. ‘J. and Pipes, R. B., International Journal of Mechanical Sciences, Vol. 15, 1973, pp. 679–688.CrossRefGoogle Scholar
  3. [3]
    Whitney, J. M. and Kim, R. Y., Journal of Composite Materials,to be published.Google Scholar
  4. [4]
    Daniel, I. M., Liber, T., and Chamis, C. C. in Composite Reliability, ASTM STP 580, 1975, pp. 340–351.Google Scholar
  5. [5]
    Hahn, H. T. and Pagano, N. J., Journal of Composite Materials, Vol. 9, Jan. 1975, pp. 91–106.ADSCrossRefGoogle Scholar
  6. [6]
    Pagano, N. J. and Rybicki, E. F., Journal of Composite Materials, Vol. 8, July 1974, pp. 214–228.ADSCrossRefGoogle Scholar
  7. [7]
    Rybicki, E. F. and Pagano, N. J. in Proceedings of the 1975 International Conference on Composite Materials, American Institute of Mining, Metallurgical and Petroleum Engineers, E. Scala, E. Anderson, I. Toth, and B. R. Noton, Eds., Toth, and B. R. 1976, Vol. 2, pp. 149–159.Google Scholar
  8. [8]
    Tsai, S. W. and Azzi, V. D., American Institute of Aeronautics and Astronautics Journal, Vol. 4, Feb. 1966, pp. 296–301.Google Scholar
  9. [9]
    Grimes, G. C. and Whitney, J. M., Society of Aerospace Material and Process Engineers Quarterly, Vol. 5, No. 4, July 1974, pp. 1–22.Google Scholar
  10. [10]
    Reifsnider, K., Stinchcomb, W. W., and Hennecke, E. G., this publication, pp. 93–105.Google Scholar
  11. [11]
    Hahn, H. T. and Tsai, S. W., Journal of Composite Materials,Vol. 8, July 1974, ‘pp. 288–305.ADSCrossRefGoogle Scholar
  12. [12]
    Tsai, S. W. and Hahn, H. T. in Inelastic Behavior of Composite Materials, C. T. Herakovich, Ed., American Society of Mechanical Engineers, 1975, pp. 73–96.Google Scholar
  13. [13]
    Halpin, J. C. and Pagano, N. J. in Recent Advances in Engineering Science, A. C. Eringen, Ed., Gordon and Breach, New York, 1970, pp. 33–46.Google Scholar
  14. [14]
    McKague, E. L., Reynolds, J. D., and Halkius, J. E., “Life Assurance of Composite Structures,” AFML-TR-75–51, Vol. 1, Wright-Patterson Air Force Base, Ohio, May 1975.Google Scholar
  15. [15]
    Shen, C-H and Springer, G. S., Journal of Composite Materials, Vol. 10, Jan. 1976, pp. 36–54.CrossRefGoogle Scholar
  16. Pagano, N. J. and Hahn, H. T., “Evaluation of Composite Curing Stresses,” Composite Materials: Testing and Design (Fourth Conference), ASTM STP 617, American Society for Testing and Materials, 1977, pp. 317–329.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1994

Authors and Affiliations

  • N. J. Pagano
    • 1
  • H. T. Hahn
    • 2
  1. 1.Nonmetallic Materials Division, Air Force Materials LaboratoryWright-Patterson Air Force BaseUSA
  2. 2.University of Dayton Research InstituteDaytonUSA

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