Shlyannikov Valerij Nikolaevich Russia Issledovatel'skij centr problem ehnergetiki Kazanskogo nauchnogo centra RAN, Rossiya, 420111, g. Kazan', ul. Lobachevskogo, 2/31, a/ya 190 shlyannikov@mail.ru Author's articles Mode Mixity Parameters for Mathematical Crack Type Repair Technology Basis of Turbine Disks by Using StressStrain State Parameters Elastic Mode Mixity Parameters for Semi-Elliptical Crack under Biaxial Loading