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Increasing energy absorption and reliability of beams by improved web-flange junctions
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.ORCID iD: 0000-0002-9207-3404
2019 (English)In: Key Engineering Materials, ISSN 1013-9826, E-ISSN 1662-9795, ISSN 1013-9826Article in journal (Refereed) Published
Abstract [en]

Lightweight and strong composite material beams are increasingly sought to quickly, easily, and cost-effectively transport and setup a variety of constructions such as bridges, cabins/ stores/shelters, vehicles etc. For structural beams produced as conventional laminated composite materials, their weak areas tend to occur at intersections such as web-flange junctions due to absence of fibres bridging the interconnections. This drawback can however be overcome with development of profiled 3D textile reinforcements having combination architectures and constituent web-flange parts inherently mutually interconnected through fibre interlacement. In addition to general strength improvement, beams containing such novel reinforcement architectures also show increased energy absorption capability due to the mutual web-flange integration at the junctions. An ‘I’ and a ‘flanged- triangle’ cross-section beams were produced by a novel non-conventional weaving method, using carbon fibres as reinforcement, and their energy absorption capabilities were tested. These beams respectively absorbed over 50% and 300% more energy per weight in bending, compared to metal counterparts. This paper presents some relevant aspects of these innovative beams.

Place, publisher, year, edition, pages
2019.
Keywords [en]
Combination-architecture; Energy absorption; Profiled beam; Web-flange junction
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-262053Scopus ID: 2-s2.0-85071597447OAI: oai:DiVA.org:kth-262053DiVA, id: diva2:1360812
Conference
AuxDefense conference, Lisbon, Portugal, 2018
Note

QC 20191209

Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-12-09Bibliographically approved

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Hallström, Stefan

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