Abstract:
Carbon fiber reinforced polymer (CFRP) is widely used in critical aerospace structures, and interference-fit bolting is one of its key joining methods. Conventional quasi-static installation features low loading rates and high stress concentration at the hole edge, which can induce delamination and matrix cracking in the hole wall. It also faces an inherent process contradiction: large interference causes damage, while small interference provides insufficient strengthening. Moreover, the feasible interference range is broad and difficult to determine precisely. This paper systematically reviews the critical interference values and the three types of quasi-static installation processes for CFRP interference-fit bolting and analyses their respective strengthening mechanisms and limitations. It then summarises the working principle and worldwide research progress of electromagnetic dynamic installation. This technique offers significant advantages in reducing installation resistance, suppressing delamination and cracking, and improving fatigue life. These advantages are discussed from four aspects: theoretical modelling, numerical simulation, experimental studies, and process applications. Research shows that electromagnetic dynamic installation can effectively overcome the interference window bottleneck inherent in quasi-static processes. Meanwhile, it can further narrow the optimal interference range and significantly improve fatigue life. The technique has already entered the initial stage of engineering application. Finally, future research directions for electromagnetic dynamic installation are discussed, including refinement of theoretical models, elucidation of damage mechanisms, evaluation of long-term service performance, and development of intelligent equipment. This review aims to provide a useful reference for CFRP interference-fit bolted assembly in the aviation industry.