According to the deformation characteristics of the mechanical clinching-upsetting process,the simple die for clinching-upset-ting connection of steel and aluminum heterogeneous plates was designed and a series of clinching-upsetting tests were carried out.Based on the Abaqus platform,the finite element analysis model of mechanical clinching-upsetting process was established,the forming charac-teristics of each stage of clinching-upsetting process were analyzed,and the influence of process parameters on the relative clearance be-tween punch and die,the relative bottom thickness and the relative upsetting distance was discussed.The results show that the established finite element model is accurate,and the maximum error is 2.46％.The relative neck thickness of the clinching joints is positively corre-lated with the relative clearance between punch and die,the relative bottom thickness and the relative upsetting distance,respectively.The relative interlock value of the clinching joints is negatively correlated with them.The reshaping stage increases the neck thickness of the clinching joints,but the interlock value decreases.When the relative upsetting distance increases from 0 to 0.44,the shear strength of the clinching joints increases by 18.7％,while the peel strength decreases by 24％.
关键词
机械铆镦/铆接接头高度/有限元仿真/力学性能
Key words
mechanical clinching-upsetting/height of clinching joints/finite element simulation/mechanical property
维普
万方数据