| Citation: | XU Chang, LIU Zhiming. Experimental study and numerical simulation on CFRP flat-joggle-flat joints[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(11): 2207-2216. doi: 10.13700/j.bh.1001-5965.2019.0062(in Chinese)
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Both experimental tests and numerical simulation were implemented to investigate the strength and failure problem of carbon fiber reinforced plastics (CFRP) flat-joggle-flat (FJF) joints. Based on the commercial finite element analysis software ABAQUS, strength prediction models of the FJF joints were built. Compared with the test results, the failure modes and the carrying capacity of the joints were studied under the tensile load condition. Meanwhile, the effect of the lap length on the joint strength and failure modes was analyzed. The results show that the carrying capacity for each joint predicted by the model has the error value under 3.5%, which illustrates good accuracy with the test results. For different lap lengths, the strength of the FJF hybrid joint is higher than that of the bonded and bolted joint. The strength of each joint increases with the lap length, but tends to flatten when the lap length increases to a certain level. As the lap length is small, the failure of the FJF hybrid joint is manifested by the fracture of the adhesive layer along the lap zone and the bearing failure. For larger lap length, the failure modes are changed into the tensile fracture of the laminated plate near the hole and the fracture of the adhesive layer extending to the hole edge.
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