Methods of design valuation of the strength of gas turbine engine disks and blades under thermocyclic operating conditions

Getsov, L. B.; Dondoshanskii, V. K.

doi:10.1007/bf01537321

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2015

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“…A verification of the proposed approach have been performed in comparison with results of full-scale tests with overloading up to a fracture [1,7,8]. Alternative approaches are considered in [9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Thermal-Fatigue Analysis of Turbine Discs under Complex Thermo-Mechanical Loading with Account of Plasticity and Creep Effects

Ignatovich

Семенов

Semenov

et al. 2015

AMM

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During operation of transport and maneuverable gas-turbine units, there are crack formation in turbine disc rims what exerted by thermomechanical cycling loads. For in-depth study of these problems we have to use theories of plasticity and creep which form the basis for determining the complex stress-strain state in the stress concentration zone for disc rims, and a modern failure criterion which can predict lifetime under conditions of simultaneous plastic and creep strain accumulation. There is a finite-element method (FEM) that allows us to evaluate the stress-strain state in a stress concentration zone for a non-elastic material behavior. With plasticity and creep theories, it is possible to determine local strain quiet reliable by FEM.

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