University of Oulu

Lipiäinen, K., Kaijalainen, A., Ahola, A., Björk, T. (2021) Fatigue strength assessment of cut edges considering material strength and cutting quality. International Journal of Fatigue, 149, 106263.

Fatigue strength assessment of cut edges considering material strength and cutting quality

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Author: Lipiäinen, Kalle1; Kaijalainen, Antti2; Ahola, Antti1;
Organizations: 1Laboratory of Steel Structures, Lappeenranta-Lahti University of Technology LUT, P.O. Box 20, FI-53851 Lappeenranta, Finland
2Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 10.7 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-04-27


In the present study, statistical analysis for previously reported cut edge fatigue test results is performed. Experimental fatigue tests are conducted for machined, plasma, and fiber laser-cut S960 edges to verify the effect of yield strength and cut edge quality, and to study the effect of the cutting method on fatigue performance. Experimental fatigue tests were complemented with hardness and residual stress measurements and metallurgical analyses with electron backscatter diffraction (EBSD) to characterize cut edge fatigue properties and to verify statistical analysis findings. The results show that cut edges can be divided into high- and low-quality categories. On the basis of these high- and low-quality categories, material strength, and applied cutting methods, FAT classes and recommended fatigue design practices are proposed.

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Series: International journal of fatigue
ISSN: 0142-1123
ISSN-E: 1879-3452
ISSN-L: 0142-1123
Volume: 149
Article number: 106263
DOI: 10.1016/j.ijfatigue.2021.106263
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The authors wish to thank Business Finland for funding via the ISA project (Grant ID: 7386/31/2018) and SSAB Europe for providing materials for experimental tests.
Copyright information: © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (