Uniaxial nonlinear viscoelastic viscoplastic modeling of polypropylene

作者：Tscharnuter Daniel^*; Jerabek Michael; Major Zoltan; Pinter Gerald

来源：Mechanics of Time-Dependent Materials, 2012, 16(3): 275-286.

DOI：10.1007/s11043-011-9158-5

• Nonlinear viscoelasticity
• Viscoplasticity
• Schapery model
• Perzyna model
• Strain recovery
• Polypropylene

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.

• 出版日期2012-8