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压铆力作为影响CFRP/Al复合构件铆接质量的重要参数,其大小往往根据经验给出,缺乏理论依据。文章针对CFRP/Al复合构件的无头铆钉压铆过程从理论建模和有限元模拟两方面研究了压铆力。首先建立CFRP/Al复合构件无头铆钉压铆的物理模型与条件假设,并将该压铆过程划分为6个阶段;其次针对铆钉和铆接件分阶段进行受力和变形分析,并采用主应力法建立压铆过程所需的压铆力的理论公式;最后采用ABAQUS有限元软件对压铆过程进行仿真分析,对压铆力的计算和仿真结果进行对比分析,表明求解压铆力的理论公式有效性良好。
As an important parameter that affects the riveting quality of CFRP / Al composite components, the riveting force is often given based on experience, lacking of theoretical basis. Aiming at the rivetless riveting process of CFRP / Al composite components, the riveting force was studied from the theoretical modeling and the finite element simulation. Firstly, the physical model and conditional assumptions of rivetless riveting on CFRP / Al composite member are established, and the riveting process is divided into six stages. Secondly, the stress and deformation analysis of rivets and rivets are carried out in stages and the main stress Method to establish the theoretical formula of the riveting force required by the riveting process. Finally, the ABAQUS finite element software was used to simulate the riveting process, the comparative analysis of the riveting force calculation and simulation results shows that the theoretical formula Effectiveness.