广义塑性力学多重屈服面模型隐式积分算法及其ABAQUS二次开发  

IMPLICIT ALGORITHM OF MULTI-YIELD-SURFACE MODEL BASED ON GENERALIZED PLASTICITY AND ITS REDEVELOPMENT IN ABAQUS

作　　者：冯嵩[1,2] 郑颖人[2] 孔亮[3] 冯夏庭[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]后勤工程学院建筑工程系,重庆400041 [3]青岛理工大学理学院,山东青岛266033

出　　处：《岩石力学与工程学报》2011年第10期2019-2025,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50979037);山东省自然科学杰出青年基金项目(JQ201017)

摘　　要：进行采用非关联流动法则的多重屈服面本构模型隐式积分算法的实现。基于广义塑性力学建模理论,模型采用由试验拟合确定的屈服面,通过大型有限元软件ABAQUS提供的用户子材料接口,采用FORTRAN语言,实现广义塑性力学的双屈服面模型的完全隐式应力积分算法。利用所开发的UMAT程序,进行黏土常规三轴数值模拟计算,通过数值模拟结果与试验结果的比较,验证模型和程序的有效性和准确性。An implicit integration algorithm of constitutive equations for multi-yield-surface model with non-associative flow rule is presented firstly.The yield criterions of multi-yield-surface model are gotten by fitting the experimental data through conventional triaxial tests and true triaxial tests based on generalized plasticity.The UMAT subroutine of this model is developed in ABAQUS with the FORTRAN language through the implicit algorithm.It is easy to verify the feasibility and accuracy of the model and the program by comparing the results of numerical simulation with that given by triaxial tests.

关 键 词：土力学 广义塑性力学 多重屈服面模型 非关联流动法则 隐式应力积分算法 

分 类 号：TU41[建筑科学—岩土工程]