A turbine blade is modeled as a rotating pretwisted beam and subjected to aerodynamic excitation from the flow path interference. The resonant stresses are determined using a modal analysis. With the help of steady steam bending and centrifugal stresses and the dynamic stresses, life estimates are made using the linear and nonlinear cumulative damage theories and a comparison of the results is presented. Based on these results, recommendations are made on the usefulness of different theories for practical application.
Blade Life: A Comparison by Cumulative Damage Theories
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, IN, June 7–10, 1999; ASME Paper 99-GT-287. Manuscript received by IGTI, Oct. 1998; final revision received by the ASME Headquarters, March 1999. Associate Editor: D. Wisler.
Rao , J. S., Pathak , A., and Chawla , A. (March 1, 1999). "Blade Life: A Comparison by Cumulative Damage Theories ." ASME. J. Eng. Gas Turbines Power. October 2001; 123(4): 886–892. https://doi.org/10.1115/1.1384879
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