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Structural optimisation for mechanical connection of very high strength (VHS) circular steel tubes

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conference contribution
posted on 2023-05-23, 09:36 authored by Rootes, J, Jiao, H, Wood, D
The very high strength steel was developed in Australia in the 1990s. It has a yield stress of 1350 MPa and an ultimate tensile strength of 1500MPa. Studies showed that a reduction in strength was inevitable when the steel was connected using fusion welding methods. A reduction of nearly 50% in the connection strength was reported for butt-welded and fillet welded samples. In order to recover the strength loss due to welding, different strengthening techniques were attempted, including bonding CFRP sheets around a connection. Recently, a feasibility study was reported on using a mechanical jointing method. Results showed that full strength of the VHS steel tube was achieved with failure happened in the parent metal rather than in the joint. The mechanical joint consisted of a wedge-shape gripper, a sleeve and a plug. The aim of this study was to optimise this mechanical joint through finite element modelling so that the overall weight of the mechanical joint could be minimised while retaining its integrity and strength.


Publication title

Proceedings of the 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23)


ST Smith






Southern Cross University

Place of publication

NSW, Australia

Event title

23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23)

Event Venue

Byron Bay, Australia

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Creative Commons Attribution 4.0 International

Repository Status

  • Open

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