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Evaluation of the Wagner irreversible constitutive equation |
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| Authors: | Dr. J. S. Vrentas C. M. Vrentas D. C. Venerus |
| Affiliation: | (1) Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA;(2) Department of Chemical Engineering, Illinois Institute of Technology, Chicago, Illinois, USA |
| 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. |
| Keywords: | K-BKZ model Wagner irreversible model double-step experiment irreversibility flow reversal |
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