基于ABAQUS的修正Burgers蠕变模型二次开发

The Secondary Development of Modified Burgers Creep Model Based on ABAQUS General Software

通过蠕变有限元理论及实现方法研究,借助ABAQUS提供的用户材料子程序UMAT,二次开发出修正Burgers蠕变模型子程序。之后对单轴蠕变试验进行数值模拟,对比分析了ABAQUS自带时间硬化蠕变模型和自编修正Burgers蠕变模型的优劣。研究证明本次编写的修正burgers蠕变UMAT子程序能够正确区分沥青混合料的粘弹性变形,弥补了ABAQUS自带蠕变模型的不足。

Research on the realization method of creep finite element, and developed a modified burgers creep model with the UMAT subroutine of ABAQUS general finite element software. With the new developed modified burgers creep model and time-harded creep model in ABAQUS,then given a numerical simulation of uniaxial creep test,so that contrasted which creep model was better. The study indicated that the developed modified burgers creep UMAT subroutine could accurately distinguish the asphalt mixture＇ s viscoelastic deformation,and filled up the deficiency of the time-harded creep model in ABAQUS.