The forming limits in non-axisymmetric square-cup deep drawing of aluminum alloy LF21, LY21(M) and steel st17 are predicted by means of the ductile fracture criterion (DFC) advanced by the author.

• 利用作者提出的韧性断裂准则预测了铝合金板LF21；LY21(M)和钢板st17非轴对称的方盒件拉深成形极限；并与成形极限图的预测结果和实验结果进行比较.