Materials pp 347-353 | Cite as

Shear Behavior of Glass-Reinforced Systems at Low Temperatures

  • P. E. Fabian
  • C. S. Hazelton
  • R. P. Reed
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 38)

Abstract

Uniaxially reinforced composites exhibit nonlinear load displacements when loaded in shear, even at very low temperatures. The nonlinearity can be attributed to both elastic and plastic deformation. Information on nonlinear and plastic strain can be obtained by closely analyzing data from low-temperature shear tests. This paper describes the nonlinear elastic and plastic deformation resulting from solid-rod torsion tests at low temperatures. Nonlinear elastic and plastic strain was measured as a function of shear stress to detect the onset of irreversible deformation. At both 77 and 4 K, nonlinear strain measurements also showed finite strain differences among various composite materials, including unique strain variations of different epoxy resin systems. A third-order stress-strain relationship for predicting yield strength was investigated.

Keywords

Plastic Strain Shear Strain Cryogenic Temperature Permanent Deformation Resin System 
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

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    M. B. Kasen, Strain-controlled torsional test method for screening the performance of composite materials at cryogenic temperatures, J. Mater. Sci. 23: 830–834 (1988).CrossRefGoogle Scholar
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    E. P. Popov, Mechanics of Materials, Prentice-Hall, New Jersey (1976).Google Scholar
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    H. T. Hahn and S. W. Tsai, Nonlinear elastic behavior of unidirectional composite laminae, J. Compos. Mater. 7: 102 (1973).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • P. E. Fabian
    • 1
  • C. S. Hazelton
    • 1
  • R. P. Reed
    • 1
  1. 1.Composite Technology Development, Inc.BoulderUSA

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