Review of 'Fracture mechanism and strength evaluation of Al5052/CFRP joint produced by coaxial one-side resistance spot welding'

To connect the metal with CFRP, the mechanical fastening and adhesive bonding are the main methods for joining. Therefore, the single spot weld or bonding between Carbon fiber reinforced plastic (CFRP) and metals have been studied. Strength, fracture modes, microstructures of bonding interface, and fracture surface were analyzed.

Most spot welded metals exhibit a high welding area, high strength, and plug out failure in case of high welding current during the lap shear test. The interfacial failure will appear for the low welding setting due to the lower weld nugget volume (see Review of Resistance Spot Welding Sheets: Processes and Failure Mode). The behavior is different for carbon fiber reinforced plastics.

Traditionally, welding process for dissimilar metal-polymer or composite materials still need further investigations due to the different properties, bonding mechanism and fracture behavior between them.

This study investigate the single spot welding of Carbon fiber reinforced polymer and metal. The mechanical properties, fracture types, and bonding strength have been presented. Only single lap shear test was used, however, I think the tensile-peel test will show the bonding strength in more details.