Abstract
A constitutive equation based on the concept of the irreversibility of the rupture of a polymer network has been previously proposed as an improvement to the K-BKZ model. This Wagner irreversible constitutive equation is evaluated here using data from double-step shear strain experiments. It is shown that the Wagner irreversible model does not in general provide good predictions when a comprehensive set of deformation histories is considered.
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Vrentas, J.S., Vrentas, C.M. & Venerus, D.C. Evaluation of the Wagner irreversible constitutive equation. Rheola Acta 30, 175–179 (1991). https://doi.org/10.1007/BF01134606
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DOI: https://doi.org/10.1007/BF01134606