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Effects of fatigue damage on the high strain-rate performance of DH36 steel


Clayton, DK and Saleh, M and Mitchell Ferguson, T and Ojeda, R, Effects of fatigue damage on the high strain-rate performance of DH36 steel, Ships and Offshore Structures, 17, (3) pp. 646-660. ISSN 1744-5302 (2021) [Refereed Article]

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DOI: doi:10.1080/17445302.2020.1861707


An 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.

Item Details

Item Type:Refereed Article
Keywords:fatigue, blast loading, SHTB, naval steel, DH36
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Naval architecture
Objective Division:Defence
Objective Group:Defence
Objective Field:Maritime
UTAS Author:Clayton, DK (Mr Daniel Clayton)
UTAS Author:Mitchell Ferguson, T (Mr Thomas Mitchell Ferguson)
UTAS Author:Ojeda, R (Dr Roberto Ojeda Rabanal)
ID Code:146301
Year Published:2021
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-08-30
Last Modified:2022-05-13

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