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Pretension diagrams for bolted joints

Published online by Cambridge University Press:  04 July 2016

E. P. Donald
E. P. Donald*
Affiliation:
Douglas Aircraft Company
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Extract

In this paper, the author seeks to present in easy-to-understand diagrams the effect of external loads on the pretensioned bolt in a bolted joint. In most cases, bolted joints are tightened up with little thought for the size of the external loads that may later be imposed upon them. Since external loads always change the preload in the bolt, it is important to know by how much the bolt load changes. Too much preload leaves too little margin for the external or working load; too little preload and the cyclic stresses cause the bolt to fatigue, assuming the bolted joint is subjected to frequent working loads. No two bolts are alike, even under the most rigorous quality control production methods, but with more sophisticated nut and bolt tightening equipment coming on to the market, better results can be achieved. The use of these diagrams will help engineers and designers understand what is happening in the bolted joint.

Type
Research Article
Information
The Aeronautical Journal , Volume 85 , Issue 841 , February 1981 , pp. 71 - 79
Copyright
Copyright © Royal Aeronautical Society 1981 

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References

1. Structural Analysis Manual, M8.070-ACD, Section 13, McDonnell Douglas, October 1970.Google Scholar
2. Mcclure, J. G. The prestressed bolt.Google Scholar
3. Meyer, G. and Strelow, D. How to calculate preload loss due to permanent set in bolted joints. Assembly Engineering, February 1972.Google Scholar
4. Osgood, C. C. Saving weight in bolted joints. Machine Design, 25th October 1979.Google Scholar
5. Junker, G. H. Criteria for self-loosening of fastener under vibration. Aircraft Engineering, October 1972 and February 1973.Google Scholar
6. Schremmer, G. How to keep bolted joints tight. Machine Design, 21st September 1972.Google Scholar
7. Dann, T. How much preload for fasteners? Machine Design, 21st August 1975.Google Scholar
8. Varrese, F. R. A users guide to fastener reliability. Metal Progress, December 1974.Google Scholar
9. Chamberlin, R. H. D. Preload cylinder head studs. Design Engineering, January 1975.Google Scholar
10. Fisher, W. A. P., Cross, R. M. and Norris, G. M. Pretensioning for preventing fatigue failure in bolts. Aircraft Engineering, June 1952.Google Scholar
11. Boomsma, M. Loosening and fatigue strength of bolted joints. The Engineer, 26th August 1955.Google Scholar
12. Jensen, A. Applied Strength of Materials. McGraw Hill, 1957.Google Scholar
13. Erker, A. Design of screw fastenings subject to repeated stresses. Inst ME and ASME International Fatigue Conference, 1956.Google Scholar
14.Modern methods for controlling the tightening of fasteners with power tools. Design Engineering, January 1975.Google Scholar
15.Quality control for threaded joints. Metrology and Inspection, February 1976.Google Scholar
16. Boys, J. T., Junker, G. H. and Wallace, P. W. Modern methods for controlling the tightening of fasteners with power tools. Unbrako SPS.Google Scholar
17. Boys, J. T. and Wallace, P. W. Design and performance of an automatic control system for fastener tightening. Proceedings Vol 191, IME, 1977.Google Scholar
18. Junker, G. H. Principle of the calculation of high-duty bolted joints. Unbrako SPS.Google Scholar
19. This Has Got To Stop. SPS Special Products.Google Scholar
20. Finkelston, R. J. The joint control fastening system (AD 74–422). SME, 1974.Google Scholar
21.Design checklist for bolted joints. Design Engineering, November 1977.Google Scholar
22. Irving, R. R. Who knows how tight is tight? The Iron Age, 3rd October 1968.Google Scholar
23.Automatic assembly. Machine Design, 16th November 1978.Google Scholar
24. Donald, E. P. Safety and the bleeding bolt concept. Engineering Design, October 1979.Google Scholar