Abstract
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/substrate interface, typical for conventional coatings, which can lead to cracking, debonding and eventual functional failure of the coating. In this paper, an FGM coating/substrate 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. (c) 2007 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 5272-5288 |
| Number of pages | 16 |
| Journal | International Journal of Solids and Structures |
| Volume | 44 |
| Issue number | 16 |
| Early online date | 31 Dec 2006 |
| DOIs | |
| Publication status | Published - Aug 2007 |
Keywords
- functionally graded material
- coating
- three-dimensional elasticity theory
- interface crack problem
- fracture-analysis
- antiplane deformation
- spallation mechanism
- contact mechanics
- plane deformation
- finite thickness
- element method
- coatings
- substrate