Title
A nonlinear viscoelastic-viscoplastic constitutive model for ionomer membranes in polymer electrolyte membrane fuel cells
Abbreviated Journal Title
J. Power Sources
Keywords
PEMFC; Nafion; Ionomer membrane; Viscoelastic; Viscoplastic; Constitutive model; TIME-DEPENDENT BEHAVIOR; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; TEMPERATURE; ELASTOMERS; HYDRATION; STRESS; PERFORMANCE; FORMULATION; HUMIDITY; Electrochemistry; Energy & Fuels
Abstract
This paper describes a phenomenological constitutive model for ionomer membranes in polymer electrolyte membrane fuel cells (PEMFCs). Unlike the existing approaches of elasto-plastic, viscoelastic, and viscoplastic model, the proposed model was inspired by micromechanisms of polymer deformation. The constitutive model is a combination of the nonlinear visco-elastic Bergstrom-Boyce model and hydration-temperature-dependent empirical equations for elastic modulus of ionomer membranes. Experiment results obtained from an uniaxial tension test for Nafion NR-111 membrane under well controlled environments were compared with simulated results by the finite element method (FEM) and the proposed model showed fairly good predictive capabilities for the large deformation behavior of the Nafion membrane subjected to the uniaxial loading condition in a wide range of relative humidity and temperature levels including liquid water. (C) 2010 Elsevier B.V. All rights reserved.
Journal Title
Journal of Power Sources
Volume
196
Issue/Number
8
Publication Date
1-1-2011
Document Type
Article
Language
English
First Page
3933
Last Page
3941
WOS Identifier
ISSN
0378-7753
Recommended Citation
"A nonlinear viscoelastic-viscoplastic constitutive model for ionomer membranes in polymer electrolyte membrane fuel cells" (2011). Faculty Bibliography 2010s. 2152.
https://stars.library.ucf.edu/facultybib2010/2152
Comments
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