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  4. Fatigue strength of AH36 thermal cut steel edges at sub-zero temperatures
 
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Fatigue strength of AH36 thermal cut steel edges at sub-zero temperatures

Citation Link: https://doi.org/10.15480/882.4939
Publikationstyp
Journal Article
Date Issued
2023-02-04
Sprache
English
Author(s)
Beiler, Marten  
Grimm, Jan-Hendrik  
Bui, Trong-Nghia  
Bock und Polach, Rüdiger Ulrich Franz von  orcid-logo
Braun, Moritz  orcid-logo
Institut
Konstruktion und Festigkeit von Schiffen M-10  
TORE-DOI
10.15480/882.4939
TORE-URI
http://hdl.handle.net/11420/14816
Journal
Journal of marine science and engineering  
Volume
11
Issue
2
Article Number
346
Citation
Journal of Marine Science and Engineering 11 (2): 346 (2023)
Publisher DOI
10.3390/jmse11020346
Scopus ID
2-s2.0-85148767032
Publisher
Multidisciplinary Digital Publishing Institute
Cruise ships or yachts that operate in areas with seasonal freezing temperatures have large openings in the outer shell. Those are thermal cut edges, and they are exposed to very low temperatures. From fatigue crack growth testing of base materials, it is known that low temperatures can accelerate the crack growth, which may reduce the fatigue life of a structure. However, the current guidelines and rules of classification societies do not provide design curves for the fatigue assessment of thermal cut steel edges at sub-zero temperatures. Therefore, fatigue tests of thermal cut edges are conducted at −20° C and -50° C as well as at room temperatures for reference. The specimens are plasma-cut and tested in a temperature chamber under uniaxial loading with a resonant testing machine. The test results are statistically evaluated using linear regression and the maximum likelihood method. The results show that the fatigue strength at sub-zero temperatures is significantly higher compared to room temperature. The test results of this study indicate that sub-zero temperatures down to −50° C do not seem to cause a reduced fatigue life of thermal cut steel edges.
Subjects
ductile–brittle transition
fatigue testing
high-strength steel
low temperature
temperature dependence of fatigue curves
thermal cut steel edges
DDC Class
530: Physik
600: Technik
620: Ingenieurwissenschaften
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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