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Mechanics of Time-Dependent Materials

, Volume 16, Issue 3, pp 275–286 | Cite as

Uniaxial nonlinear viscoelastic viscoplastic modeling of polypropylene

  • Daniel TscharnuterEmail author
  • Michael Jerabek
  • Zoltan Major
  • Gerald Pinter
Article

Abstract

This paper presents the application of the Schapery viscoelastic and the Perzyna viscoplastic models to strain recovery data of polypropylene. In a previous study, the recovery of strain after monotonic uniaxial tensile loading was measured to gather information on the viscoelasticity and viscoplasticity. The viscoplastic strains from several load histories were determined and are used to calibrate the viscoplastic model. The parameters of the one-dimensional Schapery model are then found by nonlinear optimization using the strain recovery history. The prediction of stress relaxation and creep behavior is investigated.

Keywords

Nonlinear viscoelasticity Viscoplasticity Schapery model Perzyna model Strain recovery Polypropylene 

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Copyright information

© Springer Science+Business Media, B. V. 2011

Authors and Affiliations

  • Daniel Tscharnuter
    • 1
    Email author
  • Michael Jerabek
    • 2
  • Zoltan Major
    • 3
  • Gerald Pinter
    • 4
  1. 1.Polymer Competence Center Leoben GmbHLeobenAustria
  2. 2.Borealis Polyolefine GmbHLinzAustria
  3. 3.Institute of Polymer Product EngineeringJohannes Kepler University LinzLinzAustria
  4. 4.Chair of Materials Science and Testing of PolymersUniversity of LeobenLeobenAustria

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