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Microstructural Investigation of Plasma Sprayed Ceramic Coatings Using Peridynamics

Published online by Cambridge University Press:  05 March 2020

V. Guski Open the ORCID record for V. Guski [Opens in a new window] ,
W. Verestek ,
E. Oterkus  and
S. Schmauder
V. Guski*
Affiliation:
Institute for Materials Testing, Materials Science and Strength of Materials, University of Stuttgart, Stuttgart, Germany
W. Verestek
Affiliation:
Institute for Materials Testing, Materials Science and Strength of Materials, University of Stuttgart, Stuttgart, Germany
E. Oterkus
Affiliation:
Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, United Kingdom
S. Schmauder
Affiliation:
Institute for Materials Testing, Materials Science and Strength of Materials, University of Stuttgart, Stuttgart, Germany
*
*Corresponding author ([email protected])

Abstract

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The present study deploys a continuum mechanics approach called peridynamics to investigate the damage behaviour of a 2D microstructure, which was taken from a plasma sprayed ceramic coating used in solid oxide fuel cell (SOFC) sealing systems. At the beginning, two benchmark cases, namely, plate with a hole as well as plate with a single edge notch, are considered. The results are compared to an analytical solution and a very good agreement is obtained. Based on these findings, a microstructural model from a plasma sprayed ceramic coating of SOFC sealing systems is investigated. These micromechanical simulations show that structural defects influence the crack initiation as well as the crack propagation during interconnecting the defects. Typical crack mechanisms, such as crack deflection, crack shielding or multiple cracking, are observed. Additionally, an anisotropy of the effective mechanical properties is observed in this heterogeneous material, which is well known for plasma sprayed materials.

Keywords

Bond-based peridynamicsplasma sprayed ceramicdamage modelling
Type
Research Article
Information
Journal of Mechanics , Volume 36 , Issue 2 , April 2020 , pp. 183 - 196
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
Copyright © 2020 The Society of Theoretical and Applied Mechanics

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