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Strain ageing effect on the temperature dependent mechanical properties of partially damaged structural mild-steel induced by high strain rate loading

Hosseini, Sajjad, Heidarpour, Amin, Collins, Frank and Hutchinson, Christopher R. 2016, Strain ageing effect on the temperature dependent mechanical properties of partially damaged structural mild-steel induced by high strain rate loading, Construction and building materials, vol. 123, pp. 454-463, doi: 10.1016/j.conbuildmat.2016.07.001.

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Title Strain ageing effect on the temperature dependent mechanical properties of partially damaged structural mild-steel induced by high strain rate loading
Author(s) Hosseini, Sajjad
Heidarpour, Amin
Collins, FrankORCID iD for Collins, Frank orcid.org/0000-0001-6331-5390
Hutchinson, Christopher R.
Journal name Construction and building materials
Volume number 123
Start page 454
End page 463
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-10-01
ISSN 0950-0618
Keyword(s) strain ageing
high strain rate
damage
elevated temperatures
structural steel
extreme loading
Summary This study presents the significant effect of strain ageing on the mechanical response of partially damaged structural steel under extreme loading conditions. Once partial damage occurs in a structure, it takes a while to start the repair process. This lapsed time can substantially affect the strength and ductility of the material. Since the strain ageing effect has not effectively been considered in design guidelines, an understanding of its effect on partly damaged structures is essential. In this paper, a multi-phase loading scenario including high strain rate and quasi-static loadings is applied to the structural mild steel in which partial damage is made to the specimens under high strain rate loading (Phase I). Considering different ageing times ranging from no-age to 7 days, the specimens undergo subsequent quasi-static tensile tests at ambient and elevated temperature (up to 600 °C) until failure (Phase II). Three different damage levels are introduced to examine the damage level effect on strain ageing. It is shown that the variations of ultimate strength and strain values are significantly dependent on ageing time. Presenting a numerical example, the effect of strain ageing on global behaviour of a typical structural component is studied.
Language eng
DOI 10.1016/j.conbuildmat.2016.07.001
Field of Research 0905 Civil Engineering
1202 Building
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30092618

Document type: Journal Article
Collection: Institute for Frontier Materials
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