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Effects of fatigue damage on the high strain-rate performance of DH36 steel
journal contribution
posted on 2023-05-21, 02:00 authored by Clayton, DK, Saleh, M, Thomas Mitchell FergusonThomas Mitchell Ferguson, Roberto Ojeda RabanalRoberto Ojeda RabanalAn experimental investigation has been undertaken to determine the effects of fatigue on the high strain-rate material properties of high-performance steel used in modern naval vessel structures. A novel methodology to conduct tensile testing at low and high strain-rates on fatigued specimens was developed. A bespoke Split Hopkinson’s Tension Bar clamping arrangement was designed to undertake the necessary high strain-rate testing of flat dog-bone specimens. Analysis of the microstructure of the specimens was performed alongside a comparison on the strain-rate sensitivity of the tested DH36 steel against other literature sources. Testing revealed no statistically significant effect of high cycle fatigue at high strain-rate as determined by a two-sample t-test, but revealed a possible effect on quasi-static material properties. The findings of this novel comparison between fatigued and virgin material properties of shipbuilding steel provides decision-makers and researchers with an understanding on the effect of fatigue on high strain-rate material properties.
History
Publication title
Ships and Offshore StructuresVolume
17Pagination
646-660ISSN
1744-5302Department/School
MarketingPublisher
Taylor & FrancisPlace of publication
United KingdomRights statement
Copyright 2021 Informa UK Limited, trading as Taylor & Francis GroupRepository Status
- Restricted