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- W2348054521 abstract "By using the creep strength theory of rock and the Kachanov damage theory,the relationship of damage with time is firstly proposed. By establishing the relationship of the damage and the viscoplastic rheological parameter,the nonlinear rheological parameter expression is put forward including the factors of time and loaded stress. By incorporating the parameter expression into the Nishihara model,the new nonlinear creep model is established for describing the total three-stage of creep process. When the loaded stress is larger than the long-term strength of rock,the damage occurs,and the rheological parameter begins to present nonlinearity changing with time. By compiling program of the model into finite element method code,the numerical tests are conducted, showing that the proposed creep model can properly describe the creep failure process for soft and hard rocks. It can describe not only the nonlinear failure of the soft rock,but also the abrupt failure of hard rock in the tertiary stage of creep demonstrating the extensive adaptability of the model to different kinds of rocks. The comparison of tests and calculation for marble and rock salt samples respectively further demonstrates the correctness of the model. Obviously,the achieved results show that the proposed nonlinear creep model will find good application to practical engineering." @default.
- W2348054521 created "2016-06-24" @default.
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- W2348054521 date "2009-01-01" @default.
- W2348054521 modified "2023-09-23" @default.
- W2348054521 title "RESEARCH ON NONLINEAR VISCOELASTO-PLASTIC CREEP MODEL OF ROCK" @default.
- W2348054521 hasPublicationYear "2009" @default.
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