Modeling the effect of interface characteristics and layer compositional parameters on the residual stress distribution in FG-TBC system: FEM and FIS approach
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Thermal barrier coating using turbine industries, application of pre- process simulation and on-line subsequent control basedon physical knowledge are greatly advantageous in order to develop the material performance despite of the time and costefficiency. Fuzzy linguistic- based model is one of the most accepted and promising approaches that is currently used in thecontrol systems of various engineering fields and applications. As for need of industrial units, physical simulation strategiesare too compound for industrial use and less efficient than soft computational techniques. A combination of fuzzy linguisticbasedmodel and finite element method (FEM) has therefore been developed in the terminology of a combined or “hybridmodel” in this study. The hybrid model was applied to predict residual stress during thermomechanical process in functionallygraded thermal barrier coating (FG-TBC). Results show that, interface shape amplitude and ceramic constituent in compositelayer have significant effect in distribution of residual stress in interface regions and can be considered as potent zones for bothvertical and horizontal cracks. In addition, this study shows excellent potential of such finite element-artificial intelligencehybrid approach for analysis of high temperature imposing of these protective coatings.
Abstract
Thermal barrier coating using turbine industries, application of pre- process simulation and on-line subsequent control basedon physical knowledge are greatly advantageous in order to develop the material performance despite of the time and costefficiency. Fuzzy linguistic- based model is one of the most accepted and promising approaches that is currently used in thecontrol systems of various engineering fields and applications. As for need of industrial units, physical simulation strategiesare too compound for industrial use and less efficient than soft computational techniques. A combination of fuzzy linguisticbasedmodel and finite element method (FEM) has therefore been developed in the terminology of a combined or “hybridmodel” in this study. The hybrid model was applied to predict residual stress during thermomechanical process in functionallygraded thermal barrier coating (FG-TBC). Results show that, interface shape amplitude and ceramic constituent in compositelayer have significant effect in distribution of residual stress in interface regions and can be considered as potent zones for bothvertical and horizontal cracks. In addition, this study shows excellent potential of such finite element-artificial intelligencehybrid approach for analysis of high temperature imposing of these protective coatings.
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