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基于统一强度理论的岩石弹塑性本构模型及其数值实现
引用本文:胡学龙,李克庆,璩世杰.基于统一强度理论的岩石弹塑性本构模型及其数值实现[J].爆炸与冲击,2019,39(8):127-135.
作者姓名:胡学龙  李克庆  璩世杰
作者单位:北京科技大学土木与资源工程学院,北京100083;莫纳什大学土木工程学院,澳大利亚墨尔本3800;北京科技大学土木与资源工程学院,北京,100083
基金项目:国家自然科学基金(51274020);国家留学基金(201806460033)
摘    要:基于弹塑性力学理论,以统一强度准则为屈服准则,建立了考虑硬化/软化行为和应变率效应的岩石弹塑性本构模型;采用Fortran语言通过LS-DYNA的用户自定义材料接口(Umat)对该弹塑性本构模型进行编程,并把该程序生成求解器以达到对该模型进行应用的目的;通过岩石的单轴压缩实验和SHPB实验对所建的弹塑性本构模型进行验证,结果表明,该弹塑性本构模型能够反映岩石在准静态和动态下的力学行为。

关 键 词:统一强度理论  弹塑性  本构模型  应变率效应
收稿时间:2019-02-18

The elastoplastic constitutive model of rock and its numerical implementation based on unified strength theory
HU Xuelong,LI Keqing,QU Shijie.The elastoplastic constitutive model of rock and its numerical implementation based on unified strength theory[J].Explosion and Shock Waves,2019,39(8):127-135.
Authors:HU Xuelong  LI Keqing  QU Shijie
Affiliation:1.School of civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China2.Department of Civil Engineering, Monash University, Merlbour 3800, Australia
Abstract:Based on the theory of elastoplastic mechanics, the rock elastoplastic constitutive model considering hardening/softening behavior and strain rate effect is established with the uniform strength criterion as the yield criterion. Fortran language was used to program the elastoplastic constitutive model through the user-defined material interface (Umat) of LS-DYNA. The elastoplastic constitutive model is verified by uniaxial compression test and SHPB test of rock, and the results show that the elastoplastic constitutive model can reflect the mechanical behavior of rock under quasi-static and dynamic conditions.
Keywords:unified strength theory  elastoplastic  constitutive model  strain rate effect
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