中文摘要：

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-HI11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。

英文摘要：

In order to adapt to the demand of energy conservation, emission reduction and lightweight, the products of aluminum alloy have been gaining more attention in recent years. By means of experiment and numerical simulation, the formability of 5754-H111 alumi- num alloy sheet at room temperature was measured. The forming limit diagram （FLD） was obtained through bulging experiment and test. The limit strain under plane strain condition is 0. 174. By the experiments of tensioning, deep drawing, and bulging, the simple forming limit stress diagram （FLSD） of sheet which is more practical was obtained. By using the method of changing strain path and FEM simula- tion, the predicted value of FLD was obtained. It is proved that the method has a good accuracy on predicting sheet forming limit by com- paring the simulated FLD with the experimental one.