Joining Performance Evaluation of Different Types of GEP224 Glass/epoxy-to-AZ31B Magnesium Alloys Single-lap Joints

초록

The joining performance was evaluated for different types of GEP224 glass/epoxy-to-AZ31B magnesium alloys single-lap joints. To achieve this goal, three types of the single-lap joint with an adhesive bonding, a mechanical fastening and a hybrid joint were fabricated. The joint strength and failure mechanism were investigated and compared with each other. In addition, the width and joining torque effects were evaluated. From the test results, the load-displacement curves of the bonded and the bolted single-lap joints showed nearly linear and logarithmic function shape until final failure, respectively. In the hybrid joints, it initially behaved like bonded joints while it followed the logarithmic function shape like the bolted joints after a sudden load drop. The failure strength of the bonded joint showed biggest increase as the width was getting wider. In the bolted joint, the failure load showed a decreased trend as the torque increased due to early net tension failure of CFRP parts. In contrast, the failure load of the hybrid joint increased as the torque increased.