TY - GEN
T1 - Three-dimensional numerical simulation tools for fracture analysis in planar Solid Oxide Fuel Cells (SOFCs)
AU - Johnson, Janine
AU - Qu, Jianmin
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:33845919193
SN - 047008054X
SN - 9780470080542
T3 - Ceramic Engineering and Science Proceedings
SP - 393
EP - 405
BT - Advances in Solid Oxide Fuel Cells II - A Collection of Papers Presented at the 30th International Conference on Advanced Ceramics and Composites
T2 - Advances in Solid Oxide Fuel Cells II - 30th International Conference on Advanced Ceramics and Composites
Y2 - 22 January 2006 through 27 January 2006
ER -