›› 2003, Vol. 24 ›› Issue (2): 209-214.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A new mechanical model for soft rock rheology

CHEN Yuan-jiang, PAN Chang-liang, CAO Ping, WANG Wen-xing   

  1. Institute of Mining and rock soil mechanics Engineering，College of Resources, Environment and Civil Engineering, Central South University, Changsha 410083， China
  • Received:2002-03-04 Online:2003-02-10 Published:2014-08-19

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Abstract: Soft rock would display the characteristics of elasticity and viscoelasticity under low stress, of elasticity, plasticity and viscoelasticity under higher stress and of elasticity, plasticity, viscoelasticity and viscoplasticity under very high stress .In order to describe these characteristics comprehensively, firstly the paper brought forward two nonlinear components of creep body and plastic cranny body, and combined them with KELVIN body describing the deceleration creep and HOKE body describing the instantaneous elasticity to gain a new multiple rheological model .Then it used the model to simulate the results of the multi-step incremental cycling loading and unloading creep test of soft rock and drew a conclusion that the new model could effectively describe the creep properties of soft rock under different stress level ,especially the properties of the cranny-closed phase and the creep-accelerated phase so that it could be popularly used in engineering practice.

Key words: soft rock, rheological model, creep, multi-step incremental cycling loading and unloading, mechanical test

CLC Number: 

  • TU 457
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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