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为适应节能减排与轻量化需求,铝合金产品日益受到重视。通过实验与数值模拟方法研究了5754-H111铝合金板材在室温下的成形性能。通过刚模胀形实验,测试获得了成形极限图(FLD),其中平面应变条件下极限应变为0.174。并通过单拉、拉深及胀形实验,得到更实用的板材简易成形极限应力图(FLSD)。根据应变路径的变化,结合有限元模拟得到了FLD预测值,模拟结果与实验结果吻合较好,证明了该方法在预测板材成形极限上的准确性。
In order to meet the energy-saving emission reduction and lightweight demand, aluminum products are increasingly valued. The formability of 5754-H111 aluminum alloy sheet at room temperature was studied by means of experiment and numerical simulation. The forming limit diagram (FLD) was obtained through the rigid-mold bulging test. The ultimate strain was 0.174 under the plane strain condition. And through a single pull, drawing and bulging experiments, to obtain a more practical simple sheet metal forming limit stress map (FLSD). According to the change of strain path and the finite element simulation, the predicted FLD is obtained. The simulation results are in good agreement with the experimental results, which proves the accuracy of this method in predicting the forming limit of sheet metal.