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Investigation on Mechanical Properties of a Carbon Paper Gas Diffusion Layer through a 3-D Nonlinear and Orthotropic Constitutive Model

Author

Listed:
  • Yanqin Chen

    (Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China)

  • Yuchao Ke

    (Key Laboratory of High-Performance Rubber & Products of Anhui Province, Ningguo 242300, China)

  • Yingsong Xia

    (Key Laboratory of High-Performance Rubber & Products of Anhui Province, Ningguo 242300, China)

  • Chongdu Cho

    (Department of Mechanical Engineering, Inha University, Incheon 22212, Korea)

Abstract

The mechanical loads that gas diffusion layers (GDLs) withstand in polymer electrolyte membrane fuel cell (PEMFC) stacks are sensitive to the assembly and working conditions. The mechanical properties of GDLs mostly depend on their composition materials, microstructural characteristics, operation conditions, etc. An accurate and comprehensive understanding of the mechanical performance of GDLs is significant for predicting the stress distribution and improving the assembly technology of PEMFC stacks. This study presented a novel 3-D nonlinear and orthotropic constitutive model of a carbon paper GDL to represent the material stiffness matrix with its compressive, tensile, and shear properties. Numerical simulations were performed based on the 3-D constitutive model, and the proposed 3-D model was validated against the experimental data reported previously. It is found that the simulation results of the 3-D constitutive model show a good agreement with the experimental results. Besides, the novel 3-D nonlinear and orthotropic model was applied in the overall stress simulation of a simplified PEMFC unit cell, compared to a conventional 3-D linear and isotropic model, and the simulation results of the two models show a significant difference.

Suggested Citation

  • Yanqin Chen & Yuchao Ke & Yingsong Xia & Chongdu Cho, 2021. "Investigation on Mechanical Properties of a Carbon Paper Gas Diffusion Layer through a 3-D Nonlinear and Orthotropic Constitutive Model," Energies, MDPI, vol. 14(19), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6341-:d:649835
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    References listed on IDEAS

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