Chapter 38. Three-Dimensional Numerical Simulation Tools for Fracture Analysis in Planar Solid Oxide Fuel Cells (SOFCs)

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Janine Johnson and
  2. Jianmin Qu

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch38

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

How to Cite

Johnson, J. and Qu, J. (2006) Three-Dimensional Numerical Simulation Tools for Fracture Analysis in Planar Solid Oxide Fuel Cells (SOFCs), in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 (eds N. P. Bansal, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291337.ch38

Author Information

  1. School of Mechanical Engineering Georgia Institute of Technology Atlanta, GA, 30332-0405

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080542

Online ISBN: 9780470291337

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Keywords:

  • thermomechanical;
  • configurations;
  • parameters;
  • perpendicular;
  • homogenous

Summary

A major step in future development of solid oxide fuel cells (SOFCs) is comprehension of the relationship between critical electrochemical and thermomechanical processes and the structural failure of the fuel cells. The reported research makes use of several finite element modeling tools to gain an overall understanding of fracture in a planar cell model. In our analysis, the ANSYS finite element (FEM) software is used to create a simplified cell structure with thermally induced stresses, which is then used to determine areas of high stresses in the anode-electrolyte-cathode (PEN) layers of an anode-supported planar SOFC. Refined fracture models are analyzed using the Fracture Mechanical Analyzer (FMA) code developed at Georgia Tech, which is a post-processing program capable of calculating fracture parameters in conjunction with finite element programs. The FMA code enables prediction of both crack growth and direction of three dimensional curvilinear cracks in a PEN structure under combined thermal and mechanical loading conditions. Examples of flaws in the anode, electrolyte, and at the anode-electrolyte interface will be given to demonstrate the robustness of the FMA software and to study possible failure modes of the PEN.