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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Contact Stresses in Dovetail Attachments: Finite Element Modeling

[+] Author and Article Information
G. B. Sinclair

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803-6413

N. G. Cormier

General Electric Aircraft Engines, Cinncinati, OH 45215

J. H. Griffin

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213-3890

G. Meda

Science and Technology Division, Corning, Inc., Corning, NY 14831

J. Eng. Gas Turbines Power 124(1), 182-189 (Mar 01, 1999) (8 pages) doi:10.1115/1.1391429 History: Received October 01, 1998; Revised March 01, 1999
Copyright © 2002 by ASME
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References

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Gladwell, G. M. L., 1980, Contact Problems in the Classical Theory of Elasticity, Sijthoff and Noordhoff International Publishers, Alphen aan den Rijn, The Netherlands.
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Kalker,  J. J., 1977, “A Survey of the Mechanics of Contact Between Solid Bodies,” Z. Angew. Math. Mech., 57, pp. T3–T17.
Meda, G., and Sinclair, G. B., 1996, “A Survey of Some Recent Papers in Contact Mechanics,” Report SM 96-7, Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA.
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ANSYS personnel, 1995, ANSYS User’s Manual, Revision 5.2, Vol. I, ANSYS Inc., Canonsburg, PA.
Kenny,  B., Patterson,  E. A., Said,  M., and Aradhya,  K. S. S., 1991, “Contact Stress Distributions in a Turbine Disk Dovetail Type Joint—A Comparison of Photoelastic and Finite Element Results,” Strain,27, pp. 21–24.
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Meguid,  S. A., Refaat,  M. H., and Papanikos,  P., 1996, “Theoretical and Experimental Studies of Structural Integrity of Dovetail Joints in Aeroengine Discs,” J. Mater. Process. Technol., 56, pp. 668–677.
Papanikos,  P., Meguid,  S. A., and Stjepanovic,  Z., 1998, “Three-Dimensional Nonlinear Finite Element Analysis of Dovetail Joints in Aeroengine Discs,” Finite Elem. Anal. Design, 29, pp. 173–186.
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Persson, A., 1964, “On the Stress Distribution of Cylindrical Elastic Bodies in Contact,” Doctoral dissertation, Chalmers University of Technology, Göteborg, Sweden.
Mossakovskii,  V. I., 1954, “The Fundamental Mixed Problem of the Theory of Elasticity for a Half-Space With a Circular Line Separating the Boundary Conditions,” Prikl. Mat. Mekh., 18, pp. 187–196 (in Russian).
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Sinclair, G. B., 1998, “Finite Element Analysis of Singular Elasticity Problems,” Proceedings of the Eighth International ANSYS Conference, Vol. 1, ANSYS Inc., Canonsburg, PA, pp. 225–236.
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Figures

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Dovetail attachment configuration: (a) overall attachment, (b) close-up of contact region with local coordinates, (c) close-up of disk near lower contact point with stresses acting
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Examples of contact problems: (a) indentor profiles, (b) contact stresses
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Finite element grids: (a) coarse global grid, (b) close-up of coarse global grid with submodel region shown shaded, (c) coarse submodel grid
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Converge of contact stress (μ=0): (a) global distributions (from global grids), (b) local distributions (including submodel results)
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Convergence of other stress components (μ=0.4); (a) local shear stresses, (b) local hoop stresses
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Comparison of shear stress with limiting value (τc cf. μσc, μ=0.4): (a) global comparison (from fine global grid), (b) local comparison (from fine submodel grid)

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