Title of article :
Mechanical response of fuel cell membranes subjected to a hygro-thermal cycle
Author/Authors :
Ahmet Kusoglu، نويسنده , , Anette M. Karlsson، نويسنده , , Michael H. Santare، نويسنده , , Simon Cleghorn، نويسنده , , William B. Johnson، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
10
From page :
987
To page :
996
Abstract :
The mechanical response of fuel cell proton exchange membranes subjected to a single hygro-thermal duty cycle in a fuel cell assembly is investigated through numerical means. To this end, the behavior of the membrane with temperature and humidity dependent material properties is simulated under temperature and humidity loading and unloading conditions. The stress-evolution during a simplified operating cycle is determined using finite element analysis for two clamping methods and two alignments of the bipolar plates. It is shown that compressive, plastic deformation occurs during the hygro-thermal loading, resulting in tensile residual stresses after unloading. These residual in-plane stresses in the membrane may explain the occurrence of cracks and pinholes in the membrane under cyclic loading.
Keywords :
Proton exchange membrane (PEM) , Nafion® , Hygro-thermal loading , mechanical response , Linear-elastic , Perfectly plastic
Journal title :
Journal of Power Sources
Serial Year :
2006
Journal title :
Journal of Power Sources
Record number :
438186
Link To Document :
بازگشت