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Abstract

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 Type:	Article
Authors/Creators:	Clayton, DK and Saleh, M and Mitchell Ferguson, T and Ojeda, R
Keywords:	fatigue, blast loading, SHTB, naval steel, DH36
Journal or Publication Title:	Ships and Offshore Structures
Publisher:	Taylor & Francis
ISSN:	1744-5302
DOI / ID Number:	10.1080/17445302.2020.1861707
Copyright Information:	Copyright 2021 Informa UK Limited, trading as Taylor & Francis Group
Related URLs:	Google Scholar: Mitchell Ferguson, T UTAS Profile: Ojeda, R
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