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RESEARCH PRODUCT

Re-analysis of fatigue data for welded joints using the notch stress approach

Ole Ø. MouritsenMichael Rygaard HansenJes G. AndersenMikkel Melters PedersenJimmi Wenderby

subject

EngineeringWelded jointsEffective notch stressMild notch jointsWeldingLevetidsvurderingIndustrial and Manufacturing Engineeringlaw.inventionStress (mechanics)Fatigue assessmentlawGeneral Materials ScienceReliability (statistics)Stupmsamlingerbusiness.industryMechanical EngineeringStructural engineeringNominal stressEffektiv kærv spændingerSvejste samlingerButt jointsMechanics of MaterialsModeling and SimulationButt jointMilde kærveReduction (mathematics)business

description

Abstract Experimental fatigue data for welded joints have been collected and subjected to re-analysis using the notch stress approach according to IIW recommendations. This leads to an overview regarding the reliability of the approach, based on a large number of results (767 specimens). Evidently, there are some limitations in the approach regarding mild notch joints, such as butt joints, which can be assessed non-conservatively. In order to alleviate this problem, an increased minimum notch factor of Kw ⩾ 2.0 is suggested instead of the current recommendation of Kw ⩾ 1.6. The data for most fillet-welded joints agree quite well with the FAT 225 curve; however a reduction to FAT 200 is suggested in order to achieve approximately the same safety as observed in the nominal stress approach.

yearjournalcountryeditionlanguage
2010-10-01International Journal of Fatigue
https://doi.org/10.1016/j.ijfatigue.2010.03.001