›› 2010, Vol. 31 ›› Issue (2): 350-354.

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A constitutive model for soils based on thermomechanics

WANG Qiu-sheng, WANG Yu-jie, ZHANG Bo, LI Liang   

  1. China Institute of Water Resources and Hydropower Research, Beijing100044, China
  • Received:2009-01-13 Online:2010-02-10 Published:2010-03-24

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Abstract:

Modified Cam-clay model assumes that volumetric plastic work being dissipated is equal to which is stored. But it is more common that the division between dissipated and stored work is not equal. A reference state parameter is suggested to describe the ratio of volumetric plastic work to plastic free energy. A new volumetic harding model is proposed based on generalized thermo mechanics, Since the dissipation potential functions of geomaterials depend on the current stress, non-associated flow rule must be used. Modified Cam-clay model is a special case which obeys associated flow rule; and a special case of the model presented in this paper.

Key words: free energy, dissipated function, thermo mechanics, constitutive model

CLC Number: 

  • O 343
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