Title of article :
A new version of a rumpling predictive model in thermal barrier coatings
Author/Authors :
Vaunois، نويسنده , , Jean-Roch and Dorvaux، نويسنده , , Jean-Marc and Kanouté، نويسنده , , Pascale and Chaboche، نويسنده , , Jean-Louis، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2013
Pages :
20
From page :
402
To page :
421
Abstract :
In many cases the modelling of rumpling evolutions appears as a necessary step in the development of a TBC life prediction methodology. The analytical model initiated by Balint and Hutchinson (2005) is further developed and improved, incorporating two new possibilities: 1. In addition to the 2D roughness description (with a single cosine model of the undulation), a 3D undulation shape is now available (a double cosine model), following a similar approach; 2. Both the 2D and the 3D undulation models are modified in order to allow any kind of thermomechanical cyclic loading applied by the substrate, with different maximum temperatures, including the possibility of oxidation, associated growth strains and oxide yielding during the temperature transients. ccessive modifications in the model are evaluated by successively comparing the rumpling responses at four maximum temperatures. A parametric analysis reveals the significant role of the initial undulation geometry on the influence of several material factors like the bond coat creep resistance or the presence or not of the martensitic transformation during the temperature cycle. Moreover the initial geometry also greatly affects the difference of rumpling predicted under cyclic oxidation and isothermal oxidation.
Keywords :
Thermal barrier coatings , Oxidation , Creep
Journal title :
European Journal of Mechanics: A Solids
Serial Year :
2013
Journal title :
European Journal of Mechanics: A Solids
Record number :
1402777
Link To Document :
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