This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Global Failure Criteria for SOFC Positive/Electrolyte/Negative (PEN) Structure
Technical Paper
2007-01-0997
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Due to mismatch of the coefficients of thermal expansion (CTE) of various layers in the PEN (positive/electrolyte/ negative) structures of solid oxide fuel cells (SOFC), thermal stresses and warpage on the PEN are unavoidable due to the temperature changes from the stress-free sintering temperature to room temperature during the PEN manufacturing process. In the meantime, additional mechanical stresses will also be created by mechanical flattening during the stack assembly process. In order to ensure the structural integrity of the cell and stack of SOFC, it is necessary to develop failure criteria for SOFC PEN structures based on the initial flaws occurred during cell sintering and stack assembly. In this paper, the global relationship between the critical energy release rate and critical curvature and maximum displacement of the warped cells caused by the temperature changes as well as mechanical flattening process is established so that possible failure of SOFC PEN structures may be predicted deterministically by the measurement of the curvature and displacement of the warped cells
Recommended Content
Authors
Citation
Liu, W., Sun, X., Khaleel, M., and Qu, J., "Global Failure Criteria for SOFC Positive/Electrolyte/Negative (PEN) Structure," SAE Technical Paper 2007-01-0997, 2007, https://doi.org/10.4271/2007-01-0997.Also In
References
- Virkar A.V. Chen J. Tanner C.W. Kim J.-W. “The Role of Electrode Microstructure on Activation and Concentration Polarizations in Solid Oxide Fuel Cells, Solid State Ionics, Vol 131 189 198 2000
- Teagan W.P. Thijssen J.H.J.S. Carlson E.J. Read C.J. “Current and future cost structures of fuel cell technology alternatives” in:A.J. McEvoy (Ed.), Proc. 4th European Solid Oxide Fuel Cell Forum, Lucerne Switzerland 2 969 980 2000
- Gutierrez-Mora F. Ralph J.M. Routbort J.L. “High-Temperature Mechanical Properties of Anode-Supported Bilayers” Solid State Ionics 149 177 184 2002
- Turner C. E. Introduction to Plate and Shell Theory New York American Elsevier Pub. Co. 1965
- Ventsel E. Krauthammer T. Thin Plates and Shells Theory, Analysis, and Applications New York Marcel Dekker 2001
- Burgreen D. Elements of Thermal Stress Analysis Jamaica, New York C.P. Press 1971
- Hutchinson J.W. Suo Z.G. Mixed Mode Cracking in Layered Materials Advances in Applied Mechanics 29 63 191 1992
- Beuth J.L. Cracking of Thin Bonded Films in Residual Tension International Journal of Solids and Structures 29 13 1657 75 1992
- Zak A. R. Williams M. L. Crack Point Singularities at a Bimaterial Interface J. Applied Mechanics 30 142 143 1963
- Kaw A.K. Mechanics of Composite Materials Taylor & Francis 2006
- Suo Z.G. Hutchinson J.W. Interface Crack between Two Elastic Layers Int. J. Fracture 43 1 18 1990
- Dundurs J. Edge-bonded Dissimilar Orthogonal Elastic Wedges Journal of Applied Mechanics 36 650 652 1969