统一弹塑性本构模型在ABAQUS中的开发与应用  

Secondary development and application of unified elastoplastic constitutive model to ABAQUS

作　　者：潘晓明[1,2] 孔娟[1,2] 杨钊[1,2] 刘成[1,2] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《岩土力学》2010年第4期1092-1098,共7页Rock and Soil Mechanics

摘　　要：基于统一弹塑性本构模型的有限元理论格式,根据ABAQUS的UMAT格式要求,编制相应的接口程序,将统一弹塑性本构模型引入ABAQUS中。采用退化的统一强度模型(b=0时,为Mohr-Coulomb模型)与ABAQUS自带的Mohr-Coulomb模型,对单轴试验和圆形硐室进行弹塑性分析,验证所开发材料子程序的正确性及高效性。考虑到统一强度模型的一般情况(b≠0)和屈服面硬化条件,对圆形硐室进行弹塑性计算,得到应力场的变化规律。所提出的研究思路具有普遍性,为采用ABAQUS平台进行本构模型的二次开发提供了借鉴和参考。Based on finite element theoretical scheme of tmified elastoplastic constitutive model, and according to the UMAT interface requirement of ABAQUS, the corresponding UMAT codes are programmed, which will be called by the main analytical module of ABAQUS. Adopting degenerative model of the unified strength （b = 0, Mohr-Coulomb model） and the built-in Mohr-Coulomb model of ABAQUS, the uniaxial tests and circular chamber are analyzed to verify the correctness and efficiency of the developed material subroutine. Finally, considering the general situation form of unified elastoplastic constitutive model （ b ≠ 0 ） and hard condition of yield surface, which are not available in ABAQUS software, circular chamber is simulated and variational discipline of stress field is obtained. The provided basic procedures and programming essentials of the UMAT redefining in ABAQUS are universal and can offer a reference for other developers.

关 键 词：统一强度理论 屈服面 流动矢量 奇异点 应力拉回算法 ABAQUS 

分 类 号：TD353.6[矿业工程—矿井建设]