The Tightening of Bolts to Yield and Their Performance Under Load

[+] Author and Article Information
Ian Chapman

SPS Assembly Systems, Coventry, England

John Newnham

SPS Laboratories, Naas, Ireland

Paul Wallace

Product Engineering, SPS Aero and Industrial Division, Jenkintown, PA

J. Vib., Acoust., Stress, and Reliab 108(2), 213-221 (Apr 01, 1986) (9 pages) doi:10.1115/1.3269326 History: Received May 20, 1984; Online November 23, 2009


The mechanism of tightening bolted joints and the stress distribution in the bolt are analyzed. Measurements were made of static and dynamic strength of joints. It is shown that all bolts behave elastically when external loads are applied to the joint even when the fastener was tightened to its torque-tension yield point. It is shown that joints generally fail when the external loads are sufficient to overcome the bolt preload. Fatigue reesults show that joint fatigue strength increases with preload, and that high fatigue bolts gave an improvement over standard fasteners at all preloads.

Copyright © 1986 by ASME
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