Prediction of crack propagation paths in the unit cell of sofc stacks

N. Joulaee, A. Makradi, S. Ahzi, M. A. Khaleel, B. K. Koeppel

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5 Citations (Scopus)

Abstract

Planar Solid Oxide Fuel Cells (SOFC) stacks are multi-material layered systems with different thermo-mechanical properties. Due to their severe thermal loading, these layers have to meet high demands to preserve their mechanical integrity without any cracks initiation and propagation. In this paper, cracks propagation in a typical unit cell of the stack which consists of positive electrode-electrolyte-negative electrode (PEN) is modeled. Based on the mechanical properties of each layer and their interfaces, an energy criterion as a function of crack length is used for the prediction of possible crack extensions in the PEN. An analysis of the competition between crack deflections in the interfaces and crack penetration in layers is presented.

Original languageEnglish
Pages (from-to)217-230
Number of pages14
JournalInternational Journal of Mechanics and Materials in Design
Volume5
Issue number3
DOIs
Publication statusPublished - 1 Aug 2009

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Keywords

  • Crack propagation
  • Fracture analysis
  • PEN
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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