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Article: Material properties and residual stresses of octagonal high strength steel hollow sections

TitleMaterial properties and residual stresses of octagonal high strength steel hollow sections
Authors
KeywordsOctagonal hollow section
Material properties measurements
Residual stress
High strength steel
Fabrication route
Issue Date2018
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr
Citation
Journal of Constructional Steel Research, 2018, v. 148, p. 479-490 How to Cite?
AbstractThis paper presents an experimental investigation to quantify the variation of material properties and residual stresses in the octagonal high strength steel hollow sections from different fabrication routes involving welding or combinations of welding and press-braking. Tensile coupon tests were conducted on the specimens extracted from different locations of the hollow sections with different fabrication routes and static mechanical properties and stress-strain relationship for the specimens were measured. The influence of welding on the material properties was found to be insignificant while strength enhancement was observed for the material at corners formed by press-braking. A stress-strain curve model was proposed for the material across octagonal high strength steel hollow sections. The magnitudes and distributions of longitudinal residual stresses of the octagonal high strength steel hollow sections with different fabrication routes were also measured using the sectioning method and were also found to be dependent on the fabrication route. Based on the measured residual stress results, residual stress models were developed for the hollow sections from different fabrication routes. The obtained variation of material properties and longitudinal residual stresses can be employed to accurately analyse the performance of octagonal high strength steel hollow section structural members for efficient structural designs.
Persistent Identifierhttp://hdl.handle.net/10722/259200
ISSN
2015 Impact Factor: 1.702
2015 SCImago Journal Rankings: 1.746

 

DC FieldValueLanguage
dc.contributor.authorFang, H-
dc.contributor.authorChan, TM-
dc.contributor.authorYoung, B-
dc.date.accessioned2018-09-03T04:03:03Z-
dc.date.available2018-09-03T04:03:03Z-
dc.date.issued2018-
dc.identifier.citationJournal of Constructional Steel Research, 2018, v. 148, p. 479-490-
dc.identifier.issn0143-974X-
dc.identifier.urihttp://hdl.handle.net/10722/259200-
dc.description.abstractThis paper presents an experimental investigation to quantify the variation of material properties and residual stresses in the octagonal high strength steel hollow sections from different fabrication routes involving welding or combinations of welding and press-braking. Tensile coupon tests were conducted on the specimens extracted from different locations of the hollow sections with different fabrication routes and static mechanical properties and stress-strain relationship for the specimens were measured. The influence of welding on the material properties was found to be insignificant while strength enhancement was observed for the material at corners formed by press-braking. A stress-strain curve model was proposed for the material across octagonal high strength steel hollow sections. The magnitudes and distributions of longitudinal residual stresses of the octagonal high strength steel hollow sections with different fabrication routes were also measured using the sectioning method and were also found to be dependent on the fabrication route. Based on the measured residual stress results, residual stress models were developed for the hollow sections from different fabrication routes. The obtained variation of material properties and longitudinal residual stresses can be employed to accurately analyse the performance of octagonal high strength steel hollow section structural members for efficient structural designs.-
dc.languageeng-
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jcsr-
dc.relation.ispartofJournal of Constructional Steel Research-
dc.subjectOctagonal hollow section-
dc.subjectMaterial properties measurements-
dc.subjectResidual stress-
dc.subjectHigh strength steel-
dc.subjectFabrication route-
dc.titleMaterial properties and residual stresses of octagonal high strength steel hollow sections-
dc.typeArticle-
dc.identifier.emailYoung, B: young@hku.hk-
dc.identifier.authorityYoung, B=rp00208-
dc.identifier.doi10.1016/j.jcsr.2018.06.007-
dc.identifier.hkuros289004-
dc.identifier.volume148-
dc.identifier.spage479-
dc.identifier.epage490-
dc.publisher.placeUnited Kingdom-

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