PECuliarities OF DISTRIBUTING OF VIBRATIONS STRESSES IN ONE SINGLE-CRYSTAL BLADES WITH DAMAGES

Yu.S. Vorobiov, M.A. Chugay

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 finite elements that account for the stress localization evffect 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.

Key words: turbomachine blade, one single crystal material, damage, finite elements, vibrations, stress localization.