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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第1期    总第82期    2017年1月

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文章编号:1672-7029(2017)01-0031-07
考虑洛德角影响的边界面模型在ABAQUS中的数值研究
冷伍明,伍晓伟,杨奇,聂如松,赵春彦

(中南大学 土木工程学院,湖南长沙 410075)

摘 要: 基于有限元软件ABAQUS提供的UMAT用户材料子程序接口,实现考虑洛德角影响的边界面模型的二次开发。给出其数值实现过程的关键技术和实施步骤。运用该子程序对正常固结和超固结高岭土进行固结不排水三轴试验数值模拟,研究结果表明:考虑洛德角影响的边界面模型能较好的模拟土的应力应变特性,其计算结果更接近于实测数据,验证了考虑洛德角影响的边界面模型子程序的正确性、可靠性和优越性。算例的计算结果合理可靠,表明经二次开发后ABAQUS 可用于岩土工程土体三轴固结不排水试验方面的分析,从而可扩展ABAQUS软件的应用范围。

 

关键字: 洛德角;边界面模型;有限元;二次开发

Numerical study of a boundary model considering effects of Lode angle in ABAQUS
LENG Wuming,WU Xiaowei,YANG Qi,NIE Rusong,ZHAO Chunyan

School of Civil Engineering, Central South University, Changsha 410075, China

Abstract:Based on the finite element software ABAQUS user material subroutine UMAT, consider the boundary model for influence of Lode angle of secondary development. The key techniques and implementation steps of the numerical implementation are given. Using the subroutine of normally consolidated and over consolidated kaolin were consolidated undrained triaxial test and numerical simulation. The results show that considering the Lode angle influence the boundary surface model can better simulate the soil stress strain characteristics, the calculation result is more close to the measured data to verify the subroutine considering Lode angle correctness, reliability and superiority. The result of the calculation is reasonable and reliable, which indicates that it can be applied to the analysis of three axis consolidation and non drainage experiment of soil ingeotechnical engineering, expand the application range of the ABAQUS.

 

Key words: lode angle; boundary model; finite element method; secondary development

ISSN 1672-7029
CN 43-1423/U

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