The Numerical Analysis for the Surface Crack Behavior in the Planar Solid Oxide Fuel Cell 


Vol. 33,  No. 5, pp. 1-8, Oct.  2018
10.14346/JKOSOS.2018.33.5.1


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  Abstract

A fuel cell is an energy conversion device that converts a chemical energy directly into an electrical energy and has higher energy efficiency than an internal combustion engine, but solid oxide fuel cell (SOFC) consisting of brittle ceramic material remains as a major issue regarding the mechanical properties as the crack formation and propagation. In this study, the stress distribution and crack behavior around the crack tip were evaluated, due to investigated the effects of the surface crack at the operating condition of high temperature. As a result, the difference of the generated stress was insignificant at operating conditions of high temperature according to the surface crack length changes. This is because, the high stiffness interconnect has a closed structure to suppress cell deformation about thermal expansion. The stress intensity factor ratio KⅡ/KI increased as the crack depth increased, at that time the effect of KⅡ is larger than that of KI. Also the maximum stress intensity factor increased as the crack depth increased, but the location of crack was generated at the electrolyte/anode interface, not at the crack tip.

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  Cite this article

[IEEE Style]

박철준, 권오헌, 강지웅, "The Numerical Analysis for the Surface Crack Behavior in the Planar Solid Oxide Fuel Cell," Journal of the Korean Society of Safety, vol. 33, no. 5, pp. 1-8, 2018. DOI: 10.14346/JKOSOS.2018.33.5.1.

[ACM Style]

박철준, 권오헌, and 강지웅. 2018. The Numerical Analysis for the Surface Crack Behavior in the Planar Solid Oxide Fuel Cell. Journal of the Korean Society of Safety, 33, 5, (2018), 1-8. DOI: 10.14346/JKOSOS.2018.33.5.1.

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