Stress analysis of a barb test for thermal barrier coatings

Stress distributions in a barb pullout specimen prepared from the thermal barrier coating (TBC)/substrate structure are analyzed by the finite element method. Contribution of thermal stresses and applied stresses is included in the computations. Interfacial stress singularity at the test support edg...

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Bibliographic Details
Published in:Surface & coatings technology 2008-04, Vol.202 (14), p.3413-3418
Main Authors: Cao, Ning-Yuan, Kagawa, Yutaka, Liu, Yu-Fu
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
FEM
Interface
Materials science
Metals. Metallurgy
Nonmetallic coatings
Physics
Production techniques
Stress distribution
Stress singularity
Surface treatment
Surface treatments
Thermal barrier coating
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Summary:Stress distributions in a barb pullout specimen prepared from the thermal barrier coating (TBC)/substrate structure are analyzed by the finite element method. Contribution of thermal stresses and applied stresses is included in the computations. Interfacial stress singularity at the test support edge is evaluated and effects of various Young's modulus ratios between the TBC layer and substrate are shown. The results help to understand the mechanical behavior in the barb test.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2007.12.011