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A Guide to Finite Element Simulations of Thermal Barrier Coatings

Bäker, Martin, Seiler, Philipp (2017) A Guide to Finite Element Simulations of Thermal Barrier Coatings. Journal of Thermal Spray Technology, 26 (6). pp. 1146-1160. ISSN 1059-9630. E-ISSN 1544-1016. (doi:10.1007/s11666-017-0592-z) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:89802)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
https://doi.org/10.1007/s11666-017-0592-z

Abstract

To understand the stress evolution and failure mechanisms of thermal barrier coatings (TBCs), finite element simulations are an invaluable tool. Simulations are especially useful to unwrap complex interactions of different phenomena at high temperature, including creep, sintering, diffusion, and oxidation. However, the correct setup and evaluation of a finite element model for this problem are difficult. This article reviews critical issues in modelling TBC systems. Some of the most important aspects are as follows: (a) stresses in 3D simulations may differ considerably from 2D models; (b) the interface shape strongly affects the stresses and using an idealized geometry may underestimate stresses; (c) crack propagation requires simulating sufficiently large regions to correctly capture stress redistribution; (d) a correct description of the material behaviour (visco-plasticity, TGO growth, sintering) is crucial in determining the stress state. The article discusses these and other issues in detail and provides guidelines on the choice of model parameters, boundary conditions, etc. The paper also points out open questions in modelling TBC systems and discusses aspects of verification and validation.

Item Type: Article
DOI/Identification number: 10.1007/s11666-017-0592-z
Uncontrolled keywords: finite element modelling; plasma spray forming; thermal barrier coatings (TBC); thin film coatings
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: A. Boaler
Date Deposited: 16 Aug 2021 09:56 UTC
Last Modified: 17 Aug 2021 09:36 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/89802 (The current URI for this page, for reference purposes)
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