基于有限元分析的铆螺母铆接厚度影响研究

Study on the Influence of Riveting Thickness of Rivet Nut Based on Finite Element Analysis

以某新型奥氏体不锈钢铆螺母为研究对象,基于ABAQUS、SolidWorks软件建立铆螺母铆接过程有限元仿真模型,结合有限元分析与试验研究,探究夹层厚度对铆接镦头形貌、铆螺母拉脱力、铆接连接结构拉伸性能的影响规律,分析夹层厚度对铆螺母铆接变形及铆接结构力学性能的影响机制。有限元仿真结果与试验结果一致,随夹层厚度增加,最大拔出力先增大后减小。研究结果显示:该型号铆螺母在夹层厚度为3.5 mm时,铆接结构轴向拉脱力最大,且整体连接结构拉伸性能最好。

Taking the rivet nut made of new austenitic stainless steel as the research object,the finite element simulation model of riveting process of riveted nut was established based on ABAQUS and SolidWorks software.Combining with finite element analysis and experimental research,the effects of sandwich thickness on the morphology of riveted upsetting head,the pull-out force of riveted nut and the tensile properties of riveted joint structure were explored.The influence mechanism of sandwich thickness on riveting deformation and mechanical property of riveting structure was analyzed.The finite element simulation results are consistent with the experimental results,and the maximum pullout force increases at first and then decreases with the increase of sandwich thickness.The results show that when the thickness of the interlayer is 3.5 mm,the riveting structure can bear the largest pull force,and the tensile performance of the whole connection structure is the best.