Abstract
Innovative cold joining technologies based on tube forming
Highlights
Modern lightweight structures employed in architecture, engineering and building construction make use of tubular trusses in which tubes are connected to each other or fixed to sheets
This paper aggregates several new technologies of joining by forming that were recently developed and published by the authors [3, 5]. These technologies are capable of connecting tubes and fixing tubes to sheets made from dissimilar materials as they can be successfully employed in fixture conditions that are difficult and costly to achieve by means of conventional joining technologies
Joining is performed by means of two inclined, out-of-plane, plastic instability waves that closely match the intersection of the two tubes
Summary
Modern lightweight structures employed in architecture, engineering and building construction make use of tubular trusses in which tubes are connected to each other or fixed to sheets. In case of fixing tubes to sheets, the most widespread technologies are based on the utilization of fasteners (nuts and bolts or rivets), welding and structural adhesive bonding (Figures 1g–1i). The majority of these joints are simple to design and easy to assemble and disassemble but their range of application is often limited by various technical constraints. From what was mentioned before, it can be concluded that no matter the application and the differences between the technologies that are currently available for connecting tubes (Figures 1a–1e) and fixing tubes to sheets (Figures 1g–1i), their universe of application is always limited by aesthetic, physical, chemical, and mechanical requirements.
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