Acta Mechanica Solida Sinica

, Volume 21, Issue 1, pp 85–94 | Cite as

A dual-surface damage model and evaluation for natural soils within the thermomechanical framework

  • Xuan Guo
  • Chenggang Zhao
  • Dajun Yuan
  • Mengshu Wang


Naturally deposited or residual soils exhibit more complicated behavior than remolded clays. A dual-surface damage model for structured soils is developed based on the thermodynamics framework established in our first paper. The shift stresses and the transformation between the generalized dissipative stress space and actual stress space are established following a systematic procedure. The corresponding constitutive behavior of the proposed model is determined, which reflects the internal structural configuration and damage behavior for geomaterials. Four evolution variables k j i (i = D, R; j = V, S) and the basic parameters λ, s, v and e0 are introduced to account for the progressive loss of internal structure for natural clays. A series of fully triaxial tests and isotropic compression tests are performed for structured and reconstituted samples of Beijing and Zhengzhou natural clays. The validation of the proposed model is examined by comparing the numerical results with the experimental data.

Key words

dual-surface damage model triaxial tests structured soils thermomechanical approach compressibility 


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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2008

Authors and Affiliations

  • Xuan Guo
    • 1
  • Chenggang Zhao
    • 2
  • Dajun Yuan
    • 1
  • Mengshu Wang
    • 1
  1. 1.Tunnel and Underground of Engineering Experienmental Research CenterBeijing Jiaotong UniversityBeijingChina
  2. 2.School of Civil Engineering & ArchitectureBeijing Jiaotong UniversityBeijingChina

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