Effect of two stress raisers acting together at a point
Guhse, Donald E.
Faires, Virgil M.
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Stress concentration factors are valuable tools for the machine designer when they can be accepted as reliable. When one stress concentration configuration, such as a hole, fillet, notch, machine finish, etc. exists there are numerous curves and equations available that give the theoretical extent of concentration to be expected. With two or more of these configurations present at the same point, the designer must decide whether or not to combine factors, and if so, in what manner, to obtain a good prediction. Fatigue tests in torsion were conducted in order to search for an answer to the question of a reasonable design basis for repeatedly stressed points with two stress raisers. The author wishes to acknowledge the valuable assistance and encouragement give him by Professor Virgil M. Faires, of the U.S. Naval Postgraduate School, during this project.
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