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

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Abstract

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 i j (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.

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Correspondence to Xuan Guo.

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Project supported by the Major Research of the National Natural Science Foundation of China (No.90715035) and HI-Tech Research and Development Program of China (Code 2007AA11Z132).

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Guo, X., Zhao, C., Yuan, D. et al. A dual-surface damage model and evaluation for natural soils within the thermomechanical framework. Acta Mech. Solida Sin. 21, 85–94 (2008). https://doi.org/10.1007/s10338-008-0811-8

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  • DOI: https://doi.org/10.1007/s10338-008-0811-8

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