The Viscoelastic-Plastic Behavior of a Ductile Polymer

  • H. F. Brinson


A brief discussion of the use of polymers in general and polycarbonate in particular in experimental mechanics is presented both from the viewpoint of materials for use in photomechanics and as materials for use in the validation of continuum constitutive equations. Experimental data are presented showing polycarbonate to be a ductile material with elastic, viscoelastic, and plastic behavior regimes. Using constant-head-rate tests (0.002 in./min to 20 in./min), the rate-dependent yield behavior of polycarbonate is described and is compared with that proposed for metals by Ludwik. By means of creep tests, the time-dependent yield behavior of polycarbonate is also described and compared with viscoelastic-plastic theories of Nagdi and Murch and of Crochet. Finally, possible application of the results to photoplasticity and ductile fracture are discussed.


Strain Gage Ductile Fracture Creep Test Localize Yield Experimental Mechanic 
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Copyright information

© Springer Science+Business Media New York 1973

Authors and Affiliations

  • H. F. Brinson
    • 1
  1. 1.Department of Engineering Science and MechanicsVirginia Polytechnic Institute and State UniversityBlacksburgUSA

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