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  5. Analysis of distributing of vibrations stresses in single-crystal blades with damages

Analysis of distributing of vibrations stresses in single-crystal blades with damages

M.A. Chugay
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The work presents an analysis of vibrations of single crystal turbine blade with damage. The calculations was spent on the basis of the 3D models by finite elements method with the use of the special singular finite elements that account for the stress localization effect in the crack apex. At a numerical analysis taken into account, that the spatial orientation of cracks in one single-crystal blades depended on the crystallography axes orientation. Influence of crystallographic anisotropy and damages on natural frequencies, modes and stress intensities localizations is estimated.
Keywords: workings shoulder-blades, single-crystal material, damages, method of eventual elements, forms of vibrations, localization of tensions