Non-linear viscoelastic response of polycarbonate in torsion

J. J. Pesce, G. B. McKenna

Research output: Contribution to conferencePaperpeer-review


Viscoelastic behavior of polycarbonate at room temperature and non-linear constitutive law description of the sub yield behavior are determined using pseudotime or material clock concepts of non-linear viscoelasticity. The energy clock model was tested using the single-step and two-step stress relaxation experiment and was compared to the original BKZ and a modified Boltzman equation. Results showed that the clock model described the second step torque response in which the deformation returns fully to zero; however, the model over estimated the magnitude of the negative torque obtained upon reaching the zero deformation.

Original languageEnglish
Number of pages4
StatePublished - 1995
EventProceedings of the 53rd Annual Technical Conference. Part 1 (of 3) - Boston, MA, USA
Duration: May 7 1995Oct 11 1995


ConferenceProceedings of the 53rd Annual Technical Conference. Part 1 (of 3)
CityBoston, MA, USA


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