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本程序采用 FORTRAN Ⅳ语言编写,由1个主程序、27个子程序组成;主要采用平面八节点曲边四边形等参数单元.可选用 Mises、Mohr—Coulomb、Drucker-Prager、椭圆帽盖模型等多种屈服准则,对工程结构进行弹—粘塑性有限元的应力分析。程序中对时间维度的离散可按前差分、中间差分、后差分三种不同格式进行;可选用常刚度法、切线刚度法、混合法形成单元刚度矩阵,且用波前法求解方程组。本程序可对输入信息自动进行错误检查,并可自动形成各单元的边中节点坐标。通过几个算例的计算,结果是满意的。
This program is written in FORTRAN IV language and consists of 1 main program and 27 subprograms. It mainly adopts plane eight-node curved quadrilateral and other parameter units. You can use Mises, Mohr-Coulomb, Drucker-Prager, elliptical cap models, etc. Yield criteria, the elastic-viscoplastic FEM stress analysis of the engineering structure. The discreteness of the time dimension in the program can be performed in three different formats: pre-differential, intermediate-differential, and post-differential; the constant stiffness method, tangential stiffness method, and hybrid method can be used to form the unit stiffness matrix, and the wave equations can be used to solve the equations. This program can automatically perform error checking on the input information and can automatically form the coordinates of the node in the edge of each unit. Through the calculation of several examples, the result is satisfactory.