混凝土塑性损伤ABAQUS用户子程序开发  

Development of Abaqus UMAT for plastic damage of concrete

作　　者：沈新普[1] 冯金龙[1] 郭丽丽[1] 

机构地区：[1]沈阳工业大学建筑工程学院,沈阳110178

出　　处：《沈阳工业大学学报》2008年第6期693-699,共7页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(10472072);辽宁省教育厅青年基金计划资助项目(05L310)

摘　　要：通过ABAQUS软件提供的UMAT子程序将一种新的考虑应力三轴比依赖特性的塑性损伤本构模型植入到现有的ABAQUS软件材料库中,并用UVARM子程序将自定义的损伤变量输出到结果文件.odb中进行结果图形显示.用FORTRAN语言按照ABAQUS规定的用户材料子程序的格式编写子程序,利用接口将两者联系起来.通过混凝土立方体单元单轴受压的算例和混凝土简支梁中心受集中力载荷两个算例,验证了模型和程序的有效性.由于在ABAQUS中增加了一种新的材料本构模型,有效地改进了Abaqus软件的功能.Abaqus is a set of open software into which user material subroutine can be easily implemented. New damage model coupled with plasticity for concrete has been implemented into Abaqus via UMAT subroutine. The new damage model has property of triaxiality dependent hardening. The numerical results of damage fields obtained with the new model have been exported to the odb file, which is the storage file of numerical simulation results prepared for post process via UVARM subroutine. FORTRAN language was used. The validation of the developed UMAT subroutine was verified with an example of one-element cubic block under uniaxial compression and an example of a simple-supported beam under concentrated force in the middle of the beam. The numerical simulation results indicate that the developed UMAT subroutine has improved the ability of Abaqus software in simulating the plastic damage behaviour of concrete.

关 键 词：混凝土 塑性 损伤 有限元 软件 

分 类 号：O346[理学—固体力学]