Biaxial fatigue crack growth in proton exchange membrane of fuel cells based on cyclic cohesive finite element method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Y. X. Wang
  • X. Guo
  • S. W. Shi
  • G. J. Weng
  • G. Chen

Detail(s)

Original languageEnglish
Article number105946
Journal / PublicationInternational Journal of Mechanical Sciences
Volume189
Online published15 Jul 2020
Publication statusPublished - 1 Jan 2021

Abstract

During the operation of proton exchange membrane in fuel cells, cyclic mechanical loads are introduced due to the humidity cycles. The resulting fatigue crack is known to be the main source for its mechanical degradation. In this paper, we use a relation between damage evolution of the cohesive elements and Paris law to simulate the biaxial fatigue crack growth. The effects of various loading conditions are investigated. The predicted crack growth is in a good agreement with experimental studies. Both the transverse stress and the tensile overload have retardation effects. It is also found that the fatigue crack growth rate associated with a shorter pre-crack depends more on the load waveform. Moreover, fatigue crack grows faster under the low-high loading history than the high-low one. These simulation results have provided significant insights into the fatigue failure behavior of membranes during operation conditions and can help improve their durability.

Research Area(s)

  • Biaxial fatigue crack growth, Cohesive element, Durability, Loading condition, Proton exchange membrane fuel cell, Retardation effect

Citation Format(s)

Biaxial fatigue crack growth in proton exchange membrane of fuel cells based on cyclic cohesive finite element method. / Wang, Y. X.; Guo, X.; Shi, S. W.; Weng, G. J.; Chen, G.; Lu, J.

In: International Journal of Mechanical Sciences, Vol. 189, 105946, 01.01.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review