为了准确地预测铝合金板材成形极限，将韧性断裂准则引入到数值模拟中。
To accurately predict the forming limit in aluminum alloy sheet forming, ductile fracture criterion is introduced into numerical simulation.
目前已提出的韧性断裂准则预测板料成形极限，只在简单轴对称件中得到应用。
At present, some ductile fracture criteria are applied only to predict the forming limit in stamping forming of simple axisymmetric part.
并利用韧性断裂准则作为胀形高度极限的判断依据，将模拟得到的必要数据代入到准则中。
Using the ductile fracture criterion as the reference for judging the limit height of the process to put the necessary simulation results into the criterion.
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