Models of multiaxial fatigue fracture and service life estimation of structural elements |
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| Authors: | N G Bourago A B Zhuravlev I S Nikitin |
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| Institution: | 1.Ishlinsky Institute for Problems in Mechanics,Russian Academy of Sciences,Moscow,Russia;2.Joint Institute for High Temperatures,Russian Academy of Sciences,Moscow,Russia;3.Moscow State Aviation Technological University,Moscow,Russia |
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| Abstract: | We study criteria and models of multiaxial fracture under the conditions of low-cycle fatigue (LCF). The model parameters
are determined by using the data of uniaxial fatigue tests for different coefficients of the cycle asymmetry. A procedure
for calculating the stress state of the compressor disk in a gas turbine engine (GTE) in the flight cycle of loading is outlined.
The calculated stress state and models of multiaxial fatigue fracture are used to estimate the service life of the compressor
disk. The results are compared with the observational data collected during the operation. |
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