Analysis of the Residual Stress in Multi-Layer Materials

Kun Shi; Yuan Yuan; Feng Tao Wei

doi:10.4028/www.scientific.net/AMM.160.377

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 160Analysis of the Residual Stress in Multi-Layer...

Analysis of the Residual Stress in Multi-Layer Materials

Abstract:

The residual stresses due to the mismatch between metallic bond coat and ceramic top coat lead to a collapse of all thermal barrier system. For measuring residual strain in elastic multilayer materials, the incremental hole-drilling strain-gauge method was studied. The main stresses, which is interrelated with the residual strain, is resolved on planes that are normal to a deep hole. In order to link the surface strain to the residual stress, calibration coefficients were obtained by the finite element method. The result shows that the coefficients depend on the substrate and the type of coating, the strain gauge used and the size of the step drilled.

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Periodical:

Applied Mechanics and Materials (Volume 160)

Pages:

377-380

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.160.377

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Online since:

March 2012

Authors:

Kun Shi, Yuan Yuan, Feng Tao Wei

Keywords:

Finite Element Method (FEM), Multilayer, Residual Stress

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References

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