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A Hybrid Nonlinear Constitutive Model: Comparisons With Multiple Step Data for a Polyurethane Rubber

Published

Author(s)

V Rouiller, G B. McKenna

Abstract

A nonlinear constitutive equation based on the model of Bernstein, Kearsley and Zapas (BKZ) is developed by noting that the BKZ model has a structure that looks like a time-dependent finite elasticity. By postulating, as did Valanis and Landel (VL) for rubber, that the strain potential function can be represented by a separable function in the stretches we develop a hybrid VL-BKZ viscoelastic model. Results of model predictions for multiple step deformation and stress histories are compared with experiments using a polyurethane elastomer.
Proceedings Title
ANTEC (Annual Technical Conference) of the Society of Plastics Engineers
Conference Dates
May 1, 1998
Conference Title
Society of Plastics Engineers

Keywords

BKZ model, finite elasticity, nonlinear viscoelasticity, perfect elastic fluid, polyurethane, rheology, rubber, Valanis-Landel model

Citation

Rouiller, V. and McKenna, G. (1998), A Hybrid Nonlinear Constitutive Model: Comparisons With Multiple Step Data for a Polyurethane Rubber, ANTEC (Annual Technical Conference) of the Society of Plastics Engineers (Accessed May 19, 2024)

Issues

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Created May 1, 1998, Updated June 2, 2021