A nonlinear viscoelastic–viscoplastic constitutive model for ionomer membranes in polymer electrolyte membrane fuel cells

Yoon, Wonseok; Huang, Xinyu

doi:10.1016/j.jpowsour.2010.12.034

Cited by 39 publications

(17 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PFSA ionomer membranes as visco-elastic e visco-plastic materials encompass viscous characteristics [17,25]. Under constant stress, the typical response of a viscous polymer includes an instantaneous increase in strain due to the elasticeplastic response followed by continuous straining at a non-constant rate due to the mixed elasticeplastic and viscous effects [17,26,27].…”

Section: Introductionmentioning

confidence: 99%

Creep properties of catalyst coated membranes for polymer electrolyte fuel cells

Alavijeh

Khorasany

Habisch

et al. 2015

Journal of Power Sources

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Creep properties of catalyst coated membranes for polymer electrolyte fuel cells

Alavijeh

Khorasany

Habisch

et al. 2015

Journal of Power Sources

View full text Add to dashboard Cite

“…The measurements were conducted using DMA and therefore do not measure the longterm stress-relaxation behavior. Yoon et al [14] used a phenome nological constitutive model for ionomer membranes based on micromechanisms of polymer deformation. The long-term stressrelaxation behavior was not considered while validating the model.…”

Section: Introductionmentioning

confidence: 99%

Effect of time-dependent material properties on the mechanical behavior of PFSA membranes subjected to humidity cycling

Khattra

Karlsson

Santare

et al. 2012

Journal of Power Sources

View full text Add to dashboard Cite

“…Solasi et al proposed a two-layer viscoplastic model for a constrained membrane that consists of an elastoplastic network in parallel with a viscoelastic network (Maxwell model) [22]. Yoon and Huang proposed a phenomenological model for the Nafion membrane based on micromechanisms of polymer deformation [33]. Silberstein et al investigated the effects of uniaxial and biaxial loading on Nafion and proposed an elastic-viscoplastic stress model [29,30].…”

Section: Introductionmentioning

confidence: 99%

Linear Hygrothermal Viscoelastic Characterization of Nafion NRE 211 Proton Exchange Membrane

et al. 2012

View full text Add to dashboard Cite

The tensile relaxation modulus of a commercially available proton exchange membrane, Nafion® NRE 211, was obtained over a range of humidity levels and temperatures using a commercial dynamic mechanical analyzer (DMA). Hygral stress relaxation master curves were first constructed, followed by a hygrothermal master curve using the time temperature moisture superposition principle. The hygrothermal master curve was fitted using a 10‐term Prony series and validated using longer term stress relaxation tests. To validate the results from the stress relaxation experiments, short and long‐term creep compliance was converted into stress relaxation modulus using a well‐known viscoelastic conversion formula, and compared with the relaxation modulus obtained under identical conditions. Good agreement was found between the two datasets. It was evident that relaxation data at 2% RH at the test temperatures was not superposable with the master curves obtained at higher relative humidity (10% < RH < 90%) at the temperature range 70 °C < T < 90 °C. It was observed that the longer term relaxation modulus under humid conditions matched well with the hygrothermal master curve; however, the longer term relaxation modulus under dry conditions was significantly higher than the relaxation master curve obtained under dry conditions, raising the possibility of a physical aging process in the ionomer and/or irreversible morphological changes in the membrane under dry conditions.

show abstract

A nonlinear viscoelastic–viscoplastic constitutive model for ionomer membranes in polymer electrolyte membrane fuel cells

Cited by 39 publications

References 40 publications

Creep properties of catalyst coated membranes for polymer electrolyte fuel cells

Creep properties of catalyst coated membranes for polymer electrolyte fuel cells

Effect of time-dependent material properties on the mechanical behavior of PFSA membranes subjected to humidity cycling

Linear Hygrothermal Viscoelastic Characterization of Nafion NRE 211 Proton Exchange Membrane

Contact Info

Product

Resources

About