是一款对ABAQUS的二次补充开发的模型软件，开发步骤和内容在本文中详细给出，供大家参考-Is a model of added secondary development of ABAQUS software, development steps and content is given in detail in this paper, for your reference

Abaqus——fortran的二次开发相关学习资料，着重介绍了UMAT相关内容。(Abaqus - FORTRAN's two development related learning materials, focusing on the UMAT related content)

fortran 里面的二次开发的uel例子(a example of secondary development for uel in abaqus)