The prevention of fatigue in bolts by controlled pre-tensioning is investigated theoretically. It is shown that the effect of pre-tension is to reduce the alternating load in the bolt and that the stiffness of the fitting plays an important part in this reduction. Fatigue tests on ¾-in. B.S.F. bolts with various amounts of pre-tension show how this reduction in alternating load can prevent fatigue failure. A warning is given against relying on the benefits of pre-tensioning without ensuring that pre-tension is maintained in service.
Pre-tensioning for Preventing Fatigue Failure in Bolts
Simple Theory and an Account of Experiments Carried Out at the R.A.E.
Aircraft Engineering and Aerospace Technology ; 24 , 6 ; 160-163
1952-06-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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