Study of rock elastoplastic constitutive damage model based on the unified strength theory

Based on the unified strength theory, the rock elastoplastic damage constitutive model was built considering different damage in tension and compression and strain rate effect; The present model was programmed with the Fortran language through the user defined material interface (Umat) of LS-DYNA, and the solver was generated to achieve the purpose of applying the model; The model was used to numerically simulate rock uniaxial compression test, brazilian disc splitting test and single hole blasting test respectively, and the numerical results were compared with the experimental data, the numerical results of classical model (HJC model) and the theoretical calculation results respectively.The results show that the results obtained from the model are in good agreement with the experimental data, the numerical results of the classical model (HJC model) and the theoretical results; The model can well reflect the mechanical behavior of rock under the static and dynamic load. © 2019, Editorial Board of Journal of CUMT. All right reserved.