Abstract

The purpose of this work is to establish a theoretical framework for modeling of the interface changes between the MEA components of PEM fuel cells due to load cycles. A 2D finite element model with the cohesive zone model and the fractional contact model is proposed to simulate the interface changes due to hydrothermal cycles. The material properties as functions of temperature, humidity and strain rate are applied here. The stress-strain simulations show stress and strain distributions inside the MEA, how and where, the interface changes take place during the load cycle and the cause of membrane thinning.

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