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

Pečnik, Matija (author), Nagode, Marko (author), Šeruga, Domen (author)

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.

• Language: English
• Keywords: fatigue damage, welded joint, rainflow, cantilever beam, fatigue
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2019
• Number of pages: Str. 33-41
• Numbering: Vol. 70, no. 1
• PID: 20.500.12556/RUL-107393
• UDC: 539.43:620.178.3(045)
• ISSN on article: 1225-4568
• DOI: 10.12989/sem.2019.70.1.033
• COBISS.SI-ID: 16558875
• Publication date in RUL: 10.04.2019

Record is a part of a journal

• Title: Structural engineering and mechanics
• Shortened title: Struct. eng. mech.
• Publisher: Techno-press
• ISSN: 1225-4568
• COBISS.SI-ID: 15455749

Secondary language

• Language: Slovenian
• Keywords: poškodbe, utrujanje, zvari, konzole, števne metode

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0182
• Name: Razvojna vrednotenja