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Thermomechanical Analysis of Functionally Graded Thermal Barrier Coatings with Different Microstructural Scales
Author(s) -
Pindera MarekJerzy,
Aboudi Jacob,
Arnold Steven M.
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02512.x
Subject(s) - micromechanics , materials science , thermal barrier coating , homogenization (climate) , composite material , creep , thermal , functionally graded material , stress (linguistics) , material properties , ceramic , composite number , thermodynamics , biodiversity , ecology , linguistics , philosophy , physics , biology
The recently developed two‐dimensional version of the higher‐order theory for functionally graded materials (denoted as HOTFGM‐2D in previous communications) has been used to investigate the effects of microstructural architectures in graded thermal barrier coatings (TBCs) on stress distributions in the presence of a through‐thickness temperature gradient. In particular, the response of TBCs with different levels of functionally graded microstructural refinement and different arrangements has been investigated, and the results for the through‐thickness stress distributions are compared with those based on the standard micromechanical homogenization scheme. The examples presented illustrate the shortcomings of the standard micromechanics‐based approach that is applied to the analysis of functionally graded TBCs, particularly if the presence of creep effects is included in the analysis.