Joining Behavior Evaluation of GFRP- Magnesium Joints under Different Joining Configurations

초록

This study evaluates the failure strength and failure modes of three different configurations of single lap hybrid joints with GFRP and magnesium adherends. The joints were fabricated by bonded, bolted and hybrid (bonded + bolted) joining methods. The effects of the joining torque were investigated under finger torque, 10Nm, and 20Nm. In addition, the effects of the joint width also were verified under different width of 36mm, 40mm and 44mm. From the static test, the hybrid joints showed better performance than the bolted joint increasing the joint width. The hybrid joint configuration revealed best performance at the 10Nm torque. The main failure mode of the bolt and hybrid joints was the net-tension failure of the glass adherends. At the initial stage of the loading, the bearing failure of the glass adherends was dominant. Increasing the load, the final failure mode was net-tension failure due to the stress concentration around the bolt hole. After the final failure, the plastic deformation was observed in the magnesium adherends.