PSI - Issue 57

Okan Yılmaz et al. / Procedia Structural Integrity 57 (2024) 420 – 427 Yılmaz and van Hoecke / Structural Integrity Procedia 00 (2023) 000–000

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points to compare. Milled faces of S960MC resulted in better fatigue performance compared to laser-cut and water-jet faces. This result displayed that S960MC is less tolerant to defects than S700MC. At high-cycle and infinite-fatigue lives, both grades were superior to the design curves proposed by EN1993-1-8 (2005) and EN13001-3-1 (2018), highlighting a potential for thickness and weight reduction in designs. Instead of FAT80 and FAT90 design curves proposed by the aforementioned standards, it is suggested that FAT160 with slope m = 5 can be used as a design curve with the UHSS grades tested in this study. Contrary to the requirements, the level was attained with punched holes and without any burr removal, underlining further potential. Aldazabal-Mensa, J., Garcia-Perman, T., Cicero-Gonzalez, S., Klimpel, A., Rzeznikiewicz, A., Bannister, A., Alberto-Alvarez, J., Luksa, K., Danks, S., Martin-Meizoso, A., 2016. 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