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Distortional Energy of Composite Materials

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

Abstract

IT IS THE PURPOSE of this communication to reflect on a quantity idly referred to as “distortional energy” in contemporary composites technology. While the use of this term to generically classify quadratic failure surfaces has become so prevalent that compilation of literature citations is unnecessary, one can cite specific references in which the quantity has been employed in relation to studies of material failure, e.g., [1, 2, 3]. We shall argue that the term “distortional energy” discussed in the latter references is a complete misnomer and has no physical significance except when used in connection with isotropic material behavior. We shall also suggest a more satisfying definition of the distortional energy of an orthotropic medium.

Keywords

Strain Energy Density Volumetric Strain Pure Shear Distortional Energy Orthotropic Material 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. E. Griffith and W. M. Baldwin, “Failure Theories for Generally Orthotropic Materials,” Developments in Theoretical and Applied Mechanics, Vol. 1 (1962), p. 410.Google Scholar
  2. 2.
    G. W. Forman, “A Distortion Energy Failure Theory for Orthotropic Materials,” Journal of Engineering for Industry, Vol. 94 (1972), p. 1073.CrossRefGoogle Scholar
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    L. A. Marcus, W. W. Stinchcomb, and H. M. Turgay, “Fatigue Crack Initiation in a Boron Epoxy Plate with a Circular Hole,” AFOSR TR-74–0833 (1974).Google Scholar
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    Walter Jaunzemis, Continuum Mechanics, The MacMillan Company, NY (1967), p. 76.zbMATHGoogle Scholar
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    T. H. Lin, D. Salinas, and Y. M. Ito, “Effects of Hydrostatic Stress on the Yielding of Cold Rolled Metals and Fiber-Reinforced Composites,” J. Composite Materials, Vol. 6 (1972), p. 409.CrossRefGoogle Scholar
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    G. C. Grimes and J. M. Whitney, “Degradation of Graphite/Epoxy Composite Materials Because of Load Induced Micromechanical Damage,” SAMPE Quarterly, Vol. 5 (1974), p. 1.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1994

Authors and Affiliations

  • N. J. Pagano
    • 1
  1. 1.Air Force Materials LaboratoryWright-Patterson Air Force BaseUSA

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