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The influence of edge treatment on fatigue behavior of thermal cut edges
Publikationstyp
Conference Paper
Date Issued
2022-06
Sprache
English
Volume
2
Article Number
V002T02A033
Citation
41st International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2022)
Contribution to Conference
Publisher DOI
Scopus ID
Thermal cut edges can be found in most maritime structures, e.g. in window openings or hatch corners on ships. It is very common to treat free plate edges by grinding or sandblasting due to fatigue and coating requirements. The aim of this study is to review the fatigue behavior of typical treatment methods. Within this study several fatigue tests are performed to outline the influence of treatment methods used for different steel grades, plate thicknesses and cutting processes. Especially the influence of the local edge geometry caused by treatment like grinding or milling is not covered by fatigue rules and guidelines like Eurocode or IIW. Also, the influence of yield strength is not considered by these regulations. Only in shipbuilding a fatigue bonus for high strength steels is given. However, these rules are based on older data and an update is requested by ship building industries. For the investigation shipyards and partners from other industries produced a big number of specimens for fatigue tests. Steel grades are from S235 to S460. Surface roughness as well as local treatment geometry are well documented. In addition, hardness as well as residual stress measurements were performed. Finally fatigue tests were done. Overall goal of the study is to present applicable FAT curves to be used for fatigue assessment.
Subjects
fatigue
fatigue strength
fatigue testing
steel cutting
surface quality
thermal cut edges
treatment methods
yield strength
DDC Class
600: Technology