Three-dimensional elastic deformation of a functionally graded coating/strate system

The concept of functionally graded material (FGM) is actively explored in coating design for the purpose of eliminating the mismatch of material properties at the coating/strate interface, typical for conventional coatings, which can lead to cracking, debonding and eventual functional failure of the...

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Bibliographic Details
Published in:International journal of solids and structures 2007-08, Vol.44 (16), p.5272-5288
Main Authors: Kashtalyan, M, Menshykova, M
Format: Article
Language:English
Online Access:Get full text
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Summary:The concept of functionally graded material (FGM) is actively explored in coating design for the purpose of eliminating the mismatch of material properties at the coating/strate interface, typical for conventional coatings, which can lead to cracking, debonding and eventual functional failure of the coating. In this paper, an FGM coating/strate system of finite thickness subjected to transverse loading is analysed within the context of three-dimensional elasticity theory. The Young's modulus of the coating is assumed to vary exponentially through the thickness, and the Poisson's ratio is assumed to be constant. A comparative study of FGM versus homogeneous coating is conducted, and the dependence of stress and displacement fields in the coating substrate/system on the type of coating, geometry and loading is examined and discussed.
ISSN:0020-7683
DOI:10.1016/j.ijsolstr.2006.12.035