Three - dimensional model of t - branch tube compound bulging has been established by using advanced explicit finite element codes ansys / ls - dyna with the research of distribution law of equivalent stress and plastic strain 摘要采用显示动力分析软件ansys / ls - dyna建立复合胀形三维有限元模型，深入研究了三通管液压胀形过程中应力应变分布规律，系统比较了轴向压缩胀形和复合胀形过程中应力应变变化规律、胀形支管高度、壁厚分布的差异。
