An Elastoplastic Model for Granular Materials Exhibiting Particle Crushing


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A practical elastoplastic constitutive model for granular materials is presented. And the model is suitable for description of the material behaviour for a wide range of stresses, including those sufficient to cause particle crushing. With a limited number of model parameters, the model can predict the confining-pressure dependent stress-strain relation and shear strength of granular materials in three-dimensional stresses, especially of variation of shear strength and dilatancy characteristics due to particle crushing under high confining pressure. The model parameters, which have clear physical meanings, can be determined from the results of isotropic compression test and conventional triaxial compression tests. The model performance is demonstrated for triaxial compression tests of a sand for a wide range of the confining-pressure from 0.2MPa to 8.0MPa.



Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara




D. A. Sun et al., "An Elastoplastic Model for Granular Materials Exhibiting Particle Crushing", Key Engineering Materials, Vols. 340-341, pp. 1273-1278, 2007

Online since:

June 2007




[1] K. Been, M. G. Jefferies and J. Hachey: The critical state of sands, Geotechnique, Vol. 41, No. 3, pp.365-381(1991).


[2] K. H. Roscoe and J. B. Burland: On the generalised stress-strain behavior of wet, clay. In Engineering Plasticity, Edited by J Heyman and F. A. Leckie/Cambridge University Press, pp.535-609 (1968).

[3] Y. P. Yao, H. Matsuoka and D. A. Sun: A unified elastoplastic model for clay and sand with the SMP criterion, in: Proc. 8th Australia-New Zealand Conference on Geomechanics, edited by N. Vitharana and R. Colman, Vol. 2, pp.997-1004 (1999).

[4] N. Miura and T. Yamanouchi: The effect of the particle-crushing on the hear characteristics of Toyoura sand, Proc. the Japan Society of Civil Engineering, No. 260, pp.109-118 (1977, in Japanese).

[5] D. A. Sun and Y. P. Yao: A practical elastoplastic model for granular material, Chinese Journal of Rock Mechanics and Engineering, Vol. 21, No. 8, pp.1147-1152, (2002, in Chinese).

[6] I K. shihara, F. Tatsuoka, and S. Yasuda: Undrained deformation and liquefaction of sand under cyclic stresses. Soils and Foundations, Vol. 15, No. 1, pp.29-44(1975).