管材塑性弯曲成形的有限元数值模拟分析

为深入研究管材塑性弯曲成形机理,利用数值模拟方法建立了包括工艺参数在内的管材弯曲成形全参数化有限元模型,并验证了模型的有效性.在此基础上,详细分析了管材弯曲变形过程中的应力应变分布.结果表明,最大等效应力发生在弯管起弯侧,最大等效应变则沿弯管变形区域均匀分布,管材弯曲成形处于平面应力状态和三向应变状态.

Analysis of Tube Plastic Bending Deformation based on Finite Element Numerical Simulation

In order to study the plasticforming mechanism of tube bending deeply, the whole parametric finite element model of tube bending, which including process parameters, was established using numerical simulation method. Then the effectiveness of the model was verified. On this basis, the stress and strain distribution of the bent tube during deformation process was analyzed in detail. The results show that the maximum equivalent stress occurs in the start bending area of the bent tube, and the maximum equivalent strain distributes along the bending deformation areauniformly. The bending tube is in the planestress and three-dimensional strain states.