Thermomechanical Hysteresis and Analogous Behavior of Composites

  • O. B. Pedersen
Chapter

Abstract

A stress analysis gives a simple account of the observed thermal hysteresis of copper with tungsten fibers, in terms of the frictional matrix yield stress. Initial experiments at room temperature on the mechanical hysteresis of copper with high volume fractions of tungsten fibers are reported and discussed in terms of a phenomenological model, in which the frictional matrix flow stress and the reversible matrix mean stress are both split into “elastic,” “plastic,” and “thermal” terms. The model allows separate measurements to be made of plastic friction, and the experimental results confirm Brown and Clarke’s modification of the Orowan mechanism. The possibility of extending the established mean field theory to coupled elasto-electromagnetic behavior is discussed briefly.

Keywords

Bauschinger Effect Thermal Hysteresis Thermal Residual Stress Matrix Friction Analogous Behavior 
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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • O. B. Pedersen
    • 1
  1. 1.Metallurgy DepartmentRisø National LaboratoryRoskildeDenmark

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