Static and Impact Tensile Behaviors of CFRP/CFRP Single-Lap Bonded/Gasket-Riveted Joints
摘要
Carbon fiber-reinforced polymer (CFRP) is increasingly used in modern aircrafts, where riveting remains a primary joining method. Particularly, hybrid riveting has been extensively studied due to its potential for innovation and distinctive performance advantages. However, most of the existing related studies only use rivets without other metal inserts and only focus on static mechanical behavior while ignoring the mechanical response under dynamic loads. In this paper, we developed a bonded/gasket-riveted method that combined rivets, gaskets and bonding layers and introduced a novel electromagnetic impact test to evaluate the impact performance of joints. Riveting-induced damage was characterized, and both static and impact tensile performances were also assessed. Results showed that gaskets indeed reduced the riveting damage by restraining the rivet tail deformation. Moreover, the bonding layer increased the failure load by 3.4% and stiffened the joints over the initial loading range in the static tensile. Furthermore, a systematic comparison of the joints’ responses under static tension and impact showed that the impact failure mode was sensitive to impact voltage and exhibited a significant difference from that under the static tensile. These findings provide guidance for designing aircraft composite riveted joints.