VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University632610.18287/2541-7533-2018-17-3-27-35UnknownEvaluation of turbine rotor blade life taking into account static and thermal cyclic loadingBadamshinI. Kh.<p><span lang="EN-US">Doctor of Science (Engineering)<br />Associate Professor of the Department of Aviation Engines</span></p>adbadamshin@ugatu.ac.ruUfa State Aviation Technical University3110201817327353010201830102018Copyright © 2018, VESTNIK of Samara University. Aerospace and Mechanical Engineering2018<p>The existing methods of evaluating turbine life, taking into account the effects of static and thermal cyclic loading, are based on experimental data. The need for cost- and labor-intensive experiments makes this approach difficult to apply. This brings up a crucial task of calculating the life of a turbine blade, taking into account the interaction of static and thermal cyclic loading. The classical methods based on the hypothesis of continuity do not allow calculating the strength and thermo-physical properties of a material. This problem is solved by the transition to the models of the behavior of materials from the continuity hypothesis to the account of the inter-atomic forces at the level of an elementary atomic cell. This approach makes it possible to calculate strength, elastic and thermo-physical parameters of structural elements theoretically and semi-empirically. These parameters are used as the initial data in calculating the stress-strain state of gas turbine engine elements. They are required to calculate creep strain semi-empirically. In its turn, the ultimate creep strain is a criterion for both static and thermal cyclic loading, which makes it possible to determine the blade life, taking into account their mutual influence.</p>Газотурбинный двигательтурбинарабочая лопаткаресурсползучестьстатическое и термоциклическое нагружениеGas turbine engineturbine rotor bladeservice lifecreepstatic and thermal cyclic loading[1. Kuznetsov N.D., Tseytlin V.I. Ekvivalentnye ispytaniya gazoturbinnykh dvigateley [Equivalent tests of gas turbine engines]. Moscow: Mashinostroenie Publ., 1976. 214 p.][2. Badamshin I.Kh. Ot chetyrekh k odnomu. Sily vnutri atomnogo vzaimodeystviya i prochnost' materialov [From four to one. Inter-atomic forces and strength of materials]. Mos-cow: Izdatel'skiy Dom «Akademiya Estestvoznaniya» Publ., 2016. 134 p.][3. Svoystva elementov. V 2 ch. Ch. 1. Fizicheskie svoystva: spravochnik / pod red. G.V. Samsonova [Properties of elements. In 2 parts. Part1. Physical properties: reference book / ed. by G.V. Samsonov]. Moscow: Metallurgiya Publ., 1976. 600 p.][4. Nozhnitskiy Yu.A., Golubovskiy E.R. Obespechenie prochnostnoy nadezhnosti monokristallicheskikh rabochikh lopatok vysokotemperaturnykh turbin perspektivnykh GTD. Sb. trudov mezhdunarodnoy nauchno-tekhnicheskoy konferentsii, posvyashchennoy 100-letiyu so dnya rozhdeniya akademika S.T. Kishkina «Nauchnye idei S.T. Kishkina i sovremennoe materialovedenie». Moscow: VIAM Publ., 2006. 362 p.][5. Getsov L.B. Materialy i prochnost' detaley gazovykh turbin [Materials and strength of gas turbine parts]. Leningrad: Mashinostroenie Publ., 1982. 295 p.][6. Kablov E.N., Golubovskiy E.R. Zharoprochnost' nikelevykh splavov [Heat resistance of nickel alloys]. Moscow: Mashinostroenie Publ., 1998. 464 p.][7. Novikov I.I., Rozin K.M. Kristallografiya i defekty kristallicheskoy reshetki [Crystallography and lattice defects]. Moscow: Metallurgiya Publ., 1990. 336 p.][8. Badamshin I.Kh. Sposob povysheniya resursa gazoturbinnogo dvigatelya po chislu zapuskov [A method for increasing the service life of a gas turbine engine in terms of the number of starts]. Patent RF, no. 2627490, 2017. (Publ.08.08.2017, bul. no. 22)]