Fatigue Analysis of Proton Exchange Membrane Fuel Cell Stacks Based on Structural Stress Distribution

12th International Conference on Damage Assessment of Structures

Wu, C.W.^1 ; Liu, B.^1 ; Wei, M.Y.^2 ; Liu, L.F.^1

State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian

116024, China^1

Department of Compression Systems, Aero Engine Corporation of China Commercial Aircraft Engine Co., LTD, Shanghai

200241, China^2

关键词: Clamping Force;    Fatigue analysis;    Fatigue damage theory;    Fuel cell components;    Proton exchange membrane fuel cell stacks;    Random vibrations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012041/pdf
DOI  :  10.1088/1742-6596/842/1/012041

来源: IOP

【 摘 要 】

Proton exchange membrane fuel cell (PEMFC) stack usually undergoes various vibrations during packing, transportation and serving time, in particular for those used in the automobiles and portable equipment. Based on the Miner fatigue damage theory, the fatigue lives of the fuel cell components are first assessed. Then the component fatigue life contours of the stack are obtained under four working conditions, i.e. the three single-axial (in X-, Y- and Z-axis separately) and multi-axial random vibrations. Accordingly, the component damage under various vibrations is evaluated. The stress distribution on the gasket and PEM will greatly affect their fatigue lives. Finally, we compare the fatigue lives of 4-bolt- and 6-bolt-clamping stacks under the same total clamping force, and find that increasing the bolt number could improve the bolt fatigue lives.