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The residual stress development in amorphous polymers iscalculated for rapid cooling under pressure during injection moulding.This is done primarily to predict the warpage and shrinkage behaviour ofcomponents. A nonlinear viscoelastic model based on the free-volumeconcept is used as a...
Experimental results on the uniaxial compressive stress-strainbehavior of Epon 828/T-403 over a strain rate range from 1.1 × 10 −4 to 5.2 × 10 3 s −1 were simulated using a viscoelastic viscoplastic constitutive modeldeveloped by Hasan and Boyce (1995). An optimal combination of...
The behaviour of rheological models containing more than onefractional derivative or fractional operator of fractional orders areinvestigated. All rheological models discussed can be separated intothree groups depending on magnitudes of the valueα * /β * (whereα * and β * are the orders ofsenior...
In this paper we derive linear and nonlinear theories ofthermoviscoelasticity for thermorheologically simple materials. Thisderivation is based on two theories: the Thermodynamic of IrreversibleTheory and the Generalized Viscoelastic Standard Theory. These twotheories, along with other...
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