Core-Pulling Riveting Forming Mechanism of CFRP/Alloy Components and Parameter Optimization of Deformation Zone in Nail Sleeve
Simulation and experimental methods were combined to study the influence of parameters such as yield strength and length in the high-temperature region of the deformation zone of the mechanical locking drum type core pulling rivet on the connection strength.By establishing a finite element simulation model and experimental verification,the bulging shape of the deformation zone of the nail sleeve and the failure form of the composite riveted structure were predicted,and the variation law of the load-bearing performance of the riveted structure was analyzed.In addition,by establishing a BP neural network model,the yield strength and length of the high-temperature region in the deformation zone of the rivet sleeve with the best riveting structure were obtained.The results indicate that as the yield strength of the material in the high-temperature zone of the nail sleeve component increases and the length decreases,the as-sembly force of the riveted structural component bulge forming gradually increases,and at the same time,the riveted structure also shows a peak bearing capacity,which is mainly related to the deformation of the bulge forming area and the damage of the composite material during the tensile process.
composite materialsriveting formingfinite element simulationBP neural network
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