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Calculation of Stress Intensity Factors for semi‐elliptical surface cracks in a turbine rotor
Author(s) -
Grebener H.,
Strathmeier U.,
Gnirß G.,
Herzog W.
Publication year - 1988
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19880190505
Subject(s) - rotation (mathematics) , rotor (electric) , stress intensity factor , stress (linguistics) , materials science , mechanics , turbine , intensity (physics) , surface (topology) , structural engineering , composite material , geometry , optics , physics , mechanical engineering , engineering , mathematics , fracture mechanics , linguistics , philosophy
Stress intensity factors based on linear elastic behaviour were calculated for semi‐elliptical surface cracks in the front face of a cylindrical disk. The small semi‐axis of the cracks coincides with the axis of rotation of the disk. The disk represents a part of a turbine rotor and is used to simplify the calculations. The uncracked rotor is loaded by a radial varying hoop stress distribution, caused by rotation, thermal gradients and the influence of the turbine blades. Following a procedure proposed by Mattheck at al. [1] the stress points of the cracks were calculated by means of the weight functions method.