CAJ | 학술논문

深入研究温度影响下的岩石力学模型及破坏机制 ,对于保证岩石工程稳定性具有十分重要的意义.文章以岩石损伤为主线 ,建立基于修正Mohr-Coulomb准则的岩石热-力-损伤耦合模型及其参数演化方程 ,并以ABAQUS软件为平台 ,编制了本构计算子程序 ;对泥岩三轴压缩试验进行了一系列数值模拟 ,模拟结果与实验的规律性基本一致 ,所建立的模型能够较好地反映岩石由于温度和应力影响所表现的脆-塑性过渡 ,证明了该模型的有效性.
심입연구온도영향하적암석역학모형급파배궤제 ,대우보증암석공정은정성구유십분중요적의의.문장이암석손상위주선 ,건립기우수정Mohr-Coulomb준칙적암석열-력-손상우합모형급기삼수연화방정 ,병이ABAQUS연건위평태 ,편제료본구계산자정서 ;대니암삼축압축시험진행료일계렬수치모의 ,모의결과여실험적규률성기본일치 ,소건립적모형능구교호지반영암석유우온도화응력영향소표현적취-소성과도 ,증명료해모형적유효성.
Further study of the breakage mechanism and constitutive model of rock under the tempera-ture effect has great significance to the stability of rock engineering .Based on the evolution character-istics of rock mechanics parameters under the temperature effect ,a new thermoelastoplastic damage model with improved Mohr-Coulomb criterion is proposed when the damage is considered as a key fac-tor that controls the TM coupling .The UMAT subroutine of the model is developed in ABAQUS by the implicit Euler stress integration algorithm .Then ,a series of numerical simulations are carried out by taking triaxial compression test of clay stone as an example .The numerical simulation results agree with the experimental rules and the proposed model is able to effectively depict the main features of brittle-plastic transition of rock under the temperature and stress effect ,thus proving the effectiveness of the model .