The stress concentration in keyways when torque is transmitted through keys
The stress-concentration factor for keyways is obtained by the electroplating method of strain analysis which was recently developed in Japan. The stresses in keyways are examined under most practical conditions. The shaft to be examined is set in a boss and fixed with a key so that the torque is wholly transmitted to the test piece through the key. To obtain the limit value for a shaft twisted only through a key, the fitting is devised so as to minimize the surface friction at the fitted portion. The results are compared to those reported previously by other authors in which local effects of the key are ignored.
KeywordsJapan Torque Mechanical Engineer Fluid Dynamics Stress Concentration
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- 1.Quest, H., “Eine experimentelle Lösung des Torsionsproblems,”Ing.-Archiv,4 (5),517 (1933).Google Scholar
- 2.Leven, M. M., “Stresses in Keyways by Photoelastic Methods and Comparison with Numerical Solution,”Proc. SESA,VII (2),145 (1949).Google Scholar
- 4.Nisida, M., “New Photoelastic Methods for Torsion Problem,”Proc. Intern Symp. Photoelasticity, Pergamon Press, Oxford, 109, (1963).Google Scholar
- 5.Okubo, H., “Determination of the Surface Stress by Means of Electroplating,”Jnl. Appl. Phys.,24 (9),1130 (1953), “Stress-Concentration Factors for a Circumferential Notch in a Cylindrical Shaft,” Memoirs Fac. Eng., Nagoya Univ.,6 (1), 23, (1954).Google Scholar
- 6.Okubo, H., andSato, S., “Stress-Concentration Factors in Shafts with Transverse Holes as Found by the Electroplating Methods,”Jnl. Appl. Mech., Trans. ASME,22 (2),193 (1955).Google Scholar
- 7.Okubo, H., andTakai, K., “Stress-Concentration Factors in Shafts Containing Transverse Holes and Subjected to Bending,”Jnl. Appl. Mech., Trans. ASME,23 (3),478 (1956).Google Scholar
- 8.Okubo, H., andKikuchi, S., “Stress-Concentration Factors in Shafts,”Jnl. Appl. Mech., Trans. ASME,24 (2),313 (1957).Google Scholar
- 9.Okubo, H., andNozaki, N., “Grain Growth in Metals by Cyclic Stress,”Nature,180,604 (Sept. 1957);“Grain Growth and Flecking in Electroplated Copper Caused by Cyclic Stress,” Jnl. Electrochemical Soc.,105 (7), 384 (1958).Google Scholar
- 10.Terada, K., “Erneute Untersuchung der Formzahl für Keilnuten,”Materialprüfung,5 (10),385 (1963).Google Scholar
- 11.Okubo, H., Murakami, S., andHosono, K., “Microscopic Strain Distribution and Endurance Limit in Alpha-Brass,”Jnl. Inst. Metals,91,98 (1962–63).Google Scholar