This paper describes the implementation and modification of a previously proposed unified viscoplastic constitutive model to simulate the behavior of a Yttria Stabilized Zirconia plasma sprayed thermal barrier coating. The model was recast for use in finite strain situations and modified to have a more physically acceptable non-associated flow rule. Temperature dependent material constants were found for a specific material using a novel approach based on Genetic Algorithms.

Issue Section:
Technical Papers
Keywords:
plasma arc sprayed coatings, thermal barrier coatings, viscoplasticity, plastic flow, yttrium compounds, zirconium compounds, genetic algorithms, ceramics
Topics:
Ceramics, Constitutive equations, Deformation, Flow (Dynamics), Plasmas (Ionized gases), Stress, Thermal barrier coatings, Genetic algorithms, Tensors, Temperature
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