Finite Element Simulation for TGO Instability with Crack Propagation under Thermal Cycling Based on Modified COD Criterion

Xia Huang; Jun Ding; Wen Zhong Li

doi:10.4028/www.scientific.net/AMR.472-475.183

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 472-475Finite Element Simulation for TGO Instability with...

Finite Element Simulation for TGO Instability with Crack Propagation under Thermal Cycling Based on Modified COD Criterion

Abstract:

In this work, the displacement instability of thermally grown oxide (TGO) occurring near the surface groove in Fecralloy substrate subjected to multiple purely thermal cycling, has been simulated coupled with crack propagation in TGO layer using finite element method. Due to insufficiency in the traditional criterion of crack opening displacement (COD), a modified COD criterion is employed to model crack propagation in TGO layer as thermal cycles in which the required input parameters are continually modified as thermal cycling based on the calculation result. The comparison between FEA and experimental results shows a good agreement indicating the validity and accuracy of the simulation, which may provide a solution for future works on more complicated case such as in thermal-mechanical cycling.

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Advanced Manufacturing Technology, ICMSE 2012

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Periodical:

Advanced Materials Research (Volumes 472-475)

Pages:

183-188

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.472-475.183

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Online since:

February 2012

Authors:

Xia Huang, Jun Ding, Wen Zhong Li

Keywords:

Crack Propagation, Numerical Simulation, Surface Groove, TGO Instability, Thermally Grown Oxide

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