ABAQUS在岩土工程中的应用》-费康中邓肯模型中第一种积分算法程序-ABAQUS in geotechnical engineering " - Duncan model Fécamp first program integration algorithm

利用ABAQUS中的用户材料子程序UMAT开发的三维邓肯-张模型，应力积分算法采用的是中点增量法。-Using ABAQUS user material subroutine UMAT in the development of three-dimensional Duncan- the stress integration algorithm is used in the mid-point incremental method.

用于岩土有限元计算的Duncan-zhang模型(Duncan-zhang model for the finite element calculation of rock soil)

邓肯模型UMAT子程序编写，有10个模型参数，初始状态问题，应力修正问题(The writing of the UMAT subprogram of the Duncan model)