Abstract
We propose a method for the investigation of creep and long-term strength of statically and cyclically loaded elements of power-generating units. We present the results of numerical analysis of creep and fracture of herringbone lock joints of the blades of the second stage of gas-turbine engines as well as of their stress-strain state and accumulation of damage caused by creep. We determined the periods of time to the termination of the processes of latent and complete fracture of the investigated lock joints. It is shown that the effects of high-frequency cyclic loading on the relaxation of stresses, deformation, and fracture of the lock joint are significant.
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