umat duncan 2D 用于abaqus本构模型二次开发-abaqus umat duncan 2D constitutive model for secondary development

abaqus二次开发vumat子程序，适用于三维梁单元的弹塑性本构模型，采用Kent-Park受压应力应变全程曲线-abaqus secondary development vumat routine for three-dimensional beam element constitutive model, using the Kent-Park compressive stress-strain curve of the whole