CFRP/Ti pinned joints are widely applied on main load-bearing structures of aircrafts. Understanding the dynamic behavior of the joints is important for optimal joint designs. Therefore, a dynamic test platform based on electromagnetic loading method was developed to investigate the dynamic behavior of CFRP/Ti single-lap pinned joints under tensile dynamic loading. Bearing and failure loads of the joints were evaluated, and the dynamic failure mechanism was discussed. The test results demonstrated that both bearing and failure loads decreased with impact velocity, which is consistent with the literature. Failure modes of the joints were dominated by CFRP failure. High-rate joints failed first in bearing failure mode, but ultimately experienced tearing-out failure. Moreover, much fiber and matrix fracture was observed during dynamic loading progress. A study of interference size also revealed a correlation with the dynamic behavior of the joints, which will help to optimize joint designs.
Composite Structures – Elsevier
Published: Jan 15, 2018
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