【摘要】 本文利用弹塑性有限元法分析了非轴对称拉延过程。计算中选用了考虑横向剪切影响的曲壳单元,提出了对板料随位置和加载变化而改变的边界条件的处理办法,得到了拉延过程中板料凸縁部分金属流动规律、工件剖面的几何形状,应变分布曲线等等。将计算结果与实验进行了比较,取得了一致的规律性。更多还原

【Abstract】 In this paper, an elastoplastic finite element method is used for the analysis of non-axisymmetric deep drawing processing. Thin shell elements are selected in calculation taking the effect of vertical shear into consideration. A method is presented for treating boundary condition that varies with the position and magnitude of loading. In the course of deep drawing, some findings are obtained such as flow law of flange metal, workpiece geometry, strain distribution curves, etc. The results by finite element method are in agreement with that of experiment for aluminium sheet更多还原