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http://dx.doi.org/10.12989/sem.2019.70.1.033

Influence of geometry and safety factor on fatigue damage predictions of a cantilever beam  

Pecnik, Matija (University of Ljubljana, Faculty of Mechanical Engineering)
Nagode, Marko (University of Ljubljana, Faculty of Mechanical Engineering)
Seruga, Domen (University of Ljubljana, Faculty of Mechanical Engineering)
Publication Information
Structural Engineering and Mechanics / v.70, no.1, 2019 , pp. 33-41 More about this Journal
Abstract
The influence of two parameters on fatigue damage predictions of a variably loaded cantilever beam has been examined. The first parameter is the geometry of the cantilever beam and the weld connecting it to a rear panel. Variables of the geometry examined here include the cantilever length, the weld width on the critical cross-section and the angle of the critical cross-section. The second parameter is the safety factor, as set out by the Eurocode 3 standard. An analytical approach has been used to calculate the stresses at the critical cross-section and standard rainflow counting has been used for the extraction of the load cycles from the load history. The results here suggest that a change in the width and angle of the critical cross-section has a non-linear impact on the fatigue damage. The results also show that the angle of the critical cross-section has the biggest influence on the fatigue damage and can cause the weld to withstand fatigue better. The second parameter, the safety factor, is shown to have a significant effect on the fatigue damage calculation, whereby a slight increase in the endurance safety factor can cause the calculated fatigue damage to increase considerably.
Keywords
fatigue damage; welded joint; rainflow; cantilever beam; fatigue;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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