Journal of Materials Science

, Volume 7, Issue 2, pp 176–183

The temperature dependence of yield of polycarbonate in uniaxial compression and tensile tests

  • C. Bauwens-Crowet
  • J. -C. Bauwens
  • G. Homès
Papers

DOI: 10.1007/BF02403504

Cite this article as:
Bauwens-Crowet, C., Bauwens, J.C. & Homès, G. J Mater Sci (1972) 7: 176. doi:10.1007/BF02403504

Abstract

The tensile yield stress is compared with the uniaxial compression yield stress for specimens of polycarbonate tested at constant strain rate from −120 to + 120°C. The strain rate dependence of the tensile yield stress is also studied from − 140 to + 20°C.

The yield behaviour is described by a modification of the Eyring theory of non-Newtonian viscosity where the deformation is supposed to involve two different flow processes.

The validity of a yield criterion previously established by one of us, is checked throughout the range of temperatures explored; the proposed equation gives a good fit to the data provided it is applied separately to each flow process.

Then the present investigation, combining the yield condition with the modified Eyring theory, provides a formalism which agrees with the data and accurately renders the temperature, strain rate and pressure dependence of the yield stress of polycarbonate.

Copyright information

© Chapman and Hall Ltd 1972

Authors and Affiliations

  • C. Bauwens-Crowet
    • 1
  • J. -C. Bauwens
    • 1
  • G. Homès
    • 1
  1. 1.Institut des MatériauxUniversité Libre de BruxellesBruxellesBelgium

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