Establishing a constitutive model and choosing an integral algorithmic method are the crucial matters for developing UMAT subroutine.
本构模型的建立和积分算法的选择是umat子程序开发中的核心问题。
The user material subroutine UMAT provided by the general software ABAQUS was used for programming for Shenzhujiang s double-yield surface model of earth rockfill materials.
利用ABAQUS提供的用户材料子程序UMAT的二次开发平台开发土石料的沈珠江双屈服面模型,并以一面板堆石坝为例,结合ABAQUS的“单元增加/去除”技术进行了坝体施工和水库蓄水的仿真分析。
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