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Mixed-mode stress intensity factors for an embedded crack in an orthotropic FGM coating
Date
2006-10-18
Author
Dağ, Serkan
Erdogan, F.
Metadata
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Analytical and computational methods are developed to examine mixed-mode fracture behaviour of an orthotropic FGM coating bonded to a homogeneous substrate through a layer of a bond-coat. The coating is assumed to contain an embedded crack perpendicular to the direction of the material property gradation. First, an analytical solution is developed considering a perturbation problem. Using Fourier transform, the problem is reduced to a system of singular integral equations which are solved by means of an expansion-collocation technique. Then, finite element method is utilized to investigate the same problem using the displacement correlation technique (DCT). By using the developed finite element method, mixed-mode stress intensity factors are also evaluated for an FGM coating-bond coat-substrate structure that is subjected to thermal stresses.
Subject Keywords
Orthotropic functionally graded materials
,
Mixed-mode stress intensity factors
,
Singular integral equations
,
Displacement correlation technique
URI
https://hdl.handle.net/11511/55218
Conference Name
9th International Conference on Multiscale and Functionally Graded Materials
Collections
Department of Mechanical Engineering, Conference / Seminar
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In this study, it is aimed to investigate the mixed-mode fracture behavior of orthotropic functionally graded material (FGM) coatings bonded to a homogeneous substrate through a homogeneous bond-coat. Analytical and computational methods are used to solve the embedded cracking problems under mechanical or thermal loading conditions. It is assumed that the material property gradation of the FGM coating is in the thickness direction and cracks are parallel to the boundaries. The principal axes of orthotropy a...
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S. Dağ and F. Erdogan, “Mixed-mode stress intensity factors for an embedded crack in an orthotropic FGM coating,” Oahu, HI, 2006, vol. 973, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55218.
