The stress analysis of dovetail attachments presents some challenges. These challenges stem from the high stress gradients near the edges of contact and from the nonlinearities attending conforming contact with friction. To meet these challenges with a finite element analysis, refined grids are needed with mesh sizes near the edges of contact of the order of one percent of the local radii of curvature there. A submodeling procedure is described which can provide grids of sufficient resolution in return for moderate computational effort. This procedure furnishes peak stresses near contact edges which are converging on a sequence of three submodel grids, and which typically do converge to within about five percent.
Contact Stresses in Dovetail Attachments: Finite Element Modeling
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-387. Manuscript received by IGTI, Oct. 1998; final revision received by the ASME Headquarters, Mar. 1999. Associate Editor: D. Wisler.
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Sinclair, G. B., Cormier, N. G., Griffin, J. H., and Meda, G. (March 1, 1999). "Contact Stresses in Dovetail Attachments: Finite Element Modeling ." ASME. J. Eng. Gas Turbines Power. January 2002; 124(1): 182–189. https://doi.org/10.1115/1.1391429
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