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Title: | On the use of a fictitious notch radius equal to 0.3 mm to design against fatigue welded joints made of wrought magnesium alloy AZ31 | Authors: | Karakaş, Özler Baumgartner, J. Susmel, L. |
Keywords: | Fatigue design Fictitious radius Local stress Magnesium alloy Welded joints Magnesium alloys Welding Fatigue data Fatigue strength Inverse slope Magnesium alloy AZ31 Notch radii Post processing Wrought magnesium alloys Welds |
Publisher: | Elsevier Ltd | Abstract: | In the present investigation, a large number of fatigue data generated by testing welded joints of magnesium alloy AZ31 were post-processed based on the reference radius concept. The local stresses used to perform this systematic re-analysis were determined by setting the fictitious notch radius, rf, invariably equal to 0.3 mm. According to this strategy, local stress-based S-N curves were then derived for load ratios, R, equal to -1, 0 and to 0.5. This post-processing exercise allowed us to demonstrate that a fictitious notch radius of 0.3 mm is successful in modelling the fatigue strength of weldments made of magnesium alloy AZ31. In particular, with rf=0.3 mm, this type of welded joints is recommended to be designed against fatigue by using an S-N curve having endurable local stress range, ??FAT, at N=2×106 cycles to failure equal to 40 MPa and a negative inverse slope, k, equal to 3. © 2020 Elsevier Ltd | URI: | https://hdl.handle.net/11499/36979 https://doi.org/10.1016/j.ijfatigue.2020.105747 |
ISSN: | 0142-1123 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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