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Modified Creep Model and Its Stability

YANG Cai-hong1,MAO Jun2,LI Jian-guang3   

  1. 1. College of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123100, China;2. College of Mechanical Engineering, Liaoning Technical University, Fuxin, Liaoning 123100, China;3.College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao,Shandong 266061,China
  • Received:2007-01-04 Revised:1900-01-01 Online:2008-01-26 Published:2008-01-26
  • Contact: YANG Cai-hong

Abstract: In order to express the creep characteristics of rock, a creep model, H-K-VP-(H‖N-‖St．V), where is a non-Newtonian viscosity mode, is put forwarded, according to the analysis of the creep curves and model of rocks by adopting of negative elasticity module and non-ideal viscosity model. Through the theoretical analysis and data fitting, the data is obtained from uniaxial compression creep test of shale specimens by application of modified model. The results show that the model can express various characteristics of rock creep, especially in the process of accelerating creep, furthermore, the stability of the modified model is analyzed, the outcome shows that physical parameter of rock is a important factor of influencing the rock creep stability.

Key words: rocks, creep, model, fitness of testing data, stability

CLC Number: 

  • TU452
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