Publication: Research - peer-review › Journal article – Annual report year: 2010
We present two representations of the Doi-Edwards model without Independent Alignment explicitly expressed in terms of the Finger strain tensor, its inverse and its invariants. The two representations provide explicit expressions for the stress prior to and after Rouse relaxation of chain stretch, respectively. The maximum deviations from the exact representations in simple shear, biaxial extension and uniaxial extension are of order 2%. Based on these two representations, we propose a framework for Doi-Edwards models including chain stretch in the memory integral form.
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- Second normal stress difference, Strain energy density, Orientation tensor, Constitutive equation, Tube model, Nonlinear viscoelasticity