Design charts are presented whereby the practicing design engineer can determine the equivalent flexural stiffness of flanged or curvic (toothed) couplings. Results are obtained by computing the centre line slope generated by an applied couple using a Program for Automatic Finite Element Calculations (PAFEC 75). Graphical data is provided allowing the equivalent second moment of area to be determined for flanged couplings or stress contour lines describing the effective load carrying material for curvic coupled disc assemblies.

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