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:	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:	2021-09-14
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