【摘要】 利用有限元弹塑性接触理论,建立二维轴对称弹塑性有限元模型,对铝合金点焊预压过程的力学特征进行分析,得出了锥台形电极和球面形电极条件下,工件与工件之间和电极与工件之间的接触压力分布及工件变形状况,为后续的电场分析及热场分析打下了基础。更多还原

【Abstract】 The force of resistance spot welding was important for the properties of weld nugget and quality of welded construction. Pre-pressed was that the weldment was pressed before current was flowed under cold state. Therefore, major elastic deformation and micro plastic deformation would be created in prepressing. A 2D axisymmetric model of elastic-plastic finite element method was developed to analyze the mechanical behavior of aluminium alloy resistance spot welding process. The distributions of the contact pressure and deformation of weldment at both the faying surface and the electrode/workpiece interface were obtained through the analysis. It is the basic of the following electric field and thermal field analysis.更多还原