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Acta Mechanica Sinica

, Volume 35, Issue 1, pp 78–87 | Cite as

Constitutive parameters identification of thermal barrier coatings using the virtual fields method

  • Mengmeng Zhou
  • Huimin XieEmail author
  • Luming Li
Research Paper
  • 46 Downloads

Abstract

Thermal barrier coatings (TBCs) are widely applied in thermal components to protect metallic components. Owing to the complex layered structure of TBCs and difficult preparation of coating, the mechanical characterization of TBCs should be of primary importance. With regard to TBCs, this study deals with the constitutive parameters identification of bi-material. Considering the complex construction and boundary of bi material, the virtual fields method (VFM) was employed in this study. A methodology based on the optimized virtual fields method combined with moiré interferometry was proposed for the constitutive parameters identification of bi-material. The feasibility of this method is verified using simulated deformation fields of a two-layer material subjected to three point bending loading. As an application, the deformation fields of the TBC specimens were measured by moiré interferometry. Then, the mechanical parameters of the coating were identified by the proposed method. The identification results indicate that Young’s modulus of the TBC top coating is 89.91  GPa, and its Poisson’s ratio is 0.23.

Keywords

Virtual Fields Method Thermal barrier coatings Mechanical parameters identification Moiré interferometry 

Notes

Acknowledgements

This work is financially supported by the National Key Research and Development Procedure of China (Grant 2017YFB1103900). Authors are also grateful to the financial support from the National Natural Science Foundation of China (Grants 11672153, 11232008, 11227801).

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Aerospace EngineeringTsinghua UniversityBeijingChina

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