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A METHOD FOR PREDICTING THE LIFETIME OF GAS TURBINE BLADES
Author(s) -
POLICELLA HUMBERT,
CULIÉ JEANPIERRE
Publication year - 1981
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1981.tb01117.x
Subject(s) - linearization , viscoplasticity , gas turbines , turbine blade , structural engineering , series (stratigraphy) , mechanical engineering , engineering , mechanics , nonlinear system , constitutive equation , turbine , finite element method , physics , geology , paleontology , quantum mechanics
— –The article describes a method developed at ONERA for predicting the lifetime of gas turbine blades. This method makes use of non‐linear viscoplastic constitutive laws, the problem being solved from a plane cross section assumption and through a time‐step linearization. The initiation of the first macroscopic crack is calculated from a stabilized cycle condition. A blade test rig has been developed for checking the method under load and temperature conditions that are as close as possible to operational ones. The results of two series of tests on convection cooled IN100 blades prove the method to be acceptable to design engineers.