›› 2004, Vol. 25 ›› Issue (3): 337-341.

• Fundamental Theroy and Experimental Research •     Next Articles

3-D elastic viscoplastic modeling analysis of a diatomaceous soft rock

LIAO Hong-jian1，2，SU Li-jun3，YIN Jian-hua3   

  1. 1. Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Nuhan 430071, China； 2. Xi’an Jiaotong University, Xi’an 710049, China；3. The Hong Kong Polytechnic University, Hong Kong, China
  • Received:2002-11-25 Online:2004-03-10 Published:2014-07-15

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Abstract: Based on Perzyna’s fundamental assumptions of the elastic viscopalstic theory, a viscoplastic flow rule, and Yin and Graham’s 3-D elastic viscopalstic constitutive model (3-D EVP model), the formulation under a triaxial stress state is obtained. Yin and Graham’s model proposed new concepts such as “equivalent time”, “instant time line”, “reference time line” and “limit time line”. The derived formulation is used to simulate the time-dependent stress-strain behavior of consolidated undrained triaxial tests of a soft rock. The simulated results are compared with the triaxial test results. The comparison of the results shows that agreement between the model predictions and measured results is good. This demonstrates that the EVP model can be used to describe the time-dependent stress-strain behavior of the diatomaceous soft rock.

Key words: soft rock, constitutive relation, equivalent time, strain softening, consolidated-undrained triaxial test, time-dependent

CLC Number: 

  • TU 452
  • 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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