In the present work, springback behaviour of a three-ply clad sheet metal, comprising of layers of SS430 and SS304 sandwiched with a layer of AA1050 is investigated in V-bending by using analytical, experimental and simulation techniques. The developed analytical model is based on theory of bending using Hill’s anisotropic yield criterion. The tensile properties of the clad sheet and individual layers oriented at three different directions w.r.t. the rolling direction are characterized. The tensile properties of the individual layers are used in the material model of analytical and numerical predictions of the springback. It is observed that the samples of the clad sheet which are transverse to the rolling direction, exhibit highest springback values due to higher tensile strength of the sheet when compared with the results acquired for other two orientations w.r.t. the rolling direction. These results are endorsed by the springback results obtained from analytical and simulation methods. The effect of sheet setting on the die during bending is also investigated using different techniques. The resulting longitudinal stresses before and after springback are analysed on inner and outer layers of the tested samples using experimental and numerical simulation procedures. In both the cases of sheet settings, the results of residual stress after springback predicted by simulations agree with the experimental results except a few cases.

在目前的工作中，通过使用分析、实验和模拟技术，在 V 形弯曲中研究了三层复合金属板的回弹行为，该金属板由夹着一层 AA1050 的 SS430 和 SS304 层组成。开发的分析模型基于使用希尔各向异性屈服准则的弯曲理论。对复合板和在轧制方向的三个不同方向上取向的各个层的拉伸性能进行表征。各个层的拉伸特性用于回弹分析和数值预测的材料模型。观察到横向于轧制方向的复合板样品，与在轧制方向上的其他两个取向获得的结果相比，由于板材具有更高的拉伸强度，因此表现出最高的回弹值。这些结果得到了从分析和模拟方法获得的回弹结果的认可。还使用不同的技术研究了弯曲过程中板材设置对模具的影响。使用实验和数值模拟程序对测试样品的内层和外层产生的回弹前后的纵向应力进行了分析。在两种板材设置情况下，除了少数情况外，模拟预测的回弹后残余应力结果与实验结果一致。这些结果得到了从分析和模拟方法获得的回弹结果的认可。还使用不同的技术研究了弯曲过程中板材设置对模具的影响。使用实验和数值模拟程序对测试样品的内层和外层产生的回弹前后的纵向应力进行了分析。在两种板材设置情况下，除了少数情况外，模拟预测的回弹后残余应力结果与实验结果一致。这些结果得到了从分析和模拟方法获得的回弹结果的认可。还使用不同的技术研究了弯曲过程中板材设置对模具的影响。使用实验和数值模拟程序对测试样品的内层和外层产生的回弹前后的纵向应力进行了分析。在两种板材设置情况下，除了少数情况外，模拟预测的回弹后残余应力结果与实验结果一致。