摘要: A constitutive model is derived for the isothermal nonlinear viscoelastic response in polymers, which do not possess separability property. The based on concept of transient networks, and treats a polymer as system elastic springs (adaptive links), break emerge due to micro-Brownian motion chains. breakage reformation rates adaptive links are assumed depend some strain energy density. behavior described by an integral equation, where relaxation functions satisfy partial differential equations with coefficients depending history. Adjustable parameters found fitting experimental data number polymers tension at strains up 400 per cent. To validate relations, we consider loading different rates, determine adjustable one rate strains, compare prediction observations another strains. Fair agreement between results numerical simulation demonstrated when differ more than decade.
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