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Journal of Materials Science

, Volume 9, Issue 1, pp 81–99 | Cite as

Cyclic deformation and fracture of polymers

  • S. Rabinowitz
  • P. Beardmore
Papers

Abstract

The cyclic stress-strain behaviour of a wide variety of rigid polymers has been studied. Three classes of fatigue response can be defined, each class displaying a characteristic evolutionary pattern in the stress-strain relation as deformation proceeds from the initial fatigue cycle to fatigue-crack propagation. Ductile polymers undergo a marked decrease in deformation resistance prior to crack formation; the detailed mechanism by which this “softening” develops can be related to the material microstructure and thermomechanical history. Amorphous polymers with a moderate degree of ductility soften slightly; in these materials crazing plays a dominant role in both the cyclic stress-strain response and the structural fatigue resistance. Brittle and nearly-brittle polymers are essentially stable in cyclic deformation; the fatigue resistance of these materials is very sensitive to strain amplitude in cyclic deformation.

Keywords

Fatigue Fatigue Resistance Fatigue Cycle Cyclic Deformation Deformation Resistance 
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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Copyright information

© Chapman and Hall Ltd. 1974

Authors and Affiliations

  • S. Rabinowitz
    • 1
  • P. Beardmore
    • 1
  1. 1.Metallurgy Department, Scientific Research StaffFord Motor CompanyDearbornUSA

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