Innovative Joining Technologies Based on Tube Forming
This chapter is focused on innovative and environmental friendly joining technologies for connecting tubes and fixing tubes to sheets in situations where the axis of the branch tube or sheet is perpendicular or inclined to the axis of the main body tube. In case of connecting tubes, the chapter will also cover the challenge of joining two tubes by their ends. The proposed joining technologies are based on the utilization of plastic instability waves in thin-walled tubes subjected to axial compression and may be seen as an alternative to conventional joining based on mechanical fixing with fasteners, welding and structural adhesive bonding. Besides allowing connecting dissimilar materials (e.g. metals and polymers) and being successfully employed in fixture conditions that are difficult and costly to achieve by means of conventional joining the new proposed technologies also cope with the growing concerns on the demand, lifecycle and recycling of materials.
KeywordsInclination Angle Slenderness Ratio Instability Wave Main Tube Hydraulic Testing Machine
The authors would also like to acknowledge the support provided by MCG-Mind for Metal, Carregado, Portugal.