Abstract
An effective stress approach can be employed for modeling hydro-mechanical behavior of unsaturated soils. However, any constitutive modeling which is based on the effective stress approach needs a correct definition and formulation of the effective stress. Recent theoretical studies based on the micromechanics have revealed different aspects of the effective stress in unsaturated soils such as its tensorial nature and the importance of the contractile skin forces. In this paper, the results of a new method based on rational thermodynamics have been presented and discussed which sheds light into the effective stress formulation. The results of the proposed thermodynamic approach support the previous studies based on micromechanics by emphasizing on the tensorial nature of the different terms involved in the effective stress formulation as well as the importance of the interfacial energy in mechanical behavior of unsaturated soils.
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References
Aitchison, G.D., Aust, M.I.E.: Effective stress in multi-phase systems. In: Proceedings of the Third Australia-New Zealand Conference on Soil Mech. and Foundation Eng., pp. 209–212 (1960)
Bishop, A.W.: The principle of effective stress. Teknisk Ukeblad 39, 859–863 (1959)
Borja, R.I.: On the mechanical energy and effective stress in saturated and unsaturated porous continua. Int. J. Solids Struct. 43, 1764–1786 (2006)
Chateau, X., Dormieux, L.: Micromechanics of saturated and unsaturated porous media. Int. J. Num. Anal. Meth. Geomech. 26, 831–844 (2002)
Coussy, O., Dangla, P.: Approche énergétique du comportement des sols non saturés. In: Mécanique Des Sols Non Saturés, Hermès, Paris, pp. 137–174 (2002)
Gray, W.G., Schrefler, B.A.: Thermodynamic approach to effective stress in partially saturated porous media. Eur. J. Mech. A/Solids 20, 521–538 (2001)
Gray, W.G., Schrefler, B.A., Pesavento, F.: The solid stress tensor in porous media mechanics and the Hill-Mandel condition. JMPS 57, 539–544 (2009)
Hassanizadeh, S.M., Gray, W.G.: General Conservation Equations for Multi-phase Systems Mass, Momentum, Energy, and Entropy Equations. Advances in Water Resources 2, 191–208 (1979)
Hassanizadeh, S.M., Gray, W.G.: Mechanics and thermodynamics of multiphase flow in porous media including interphase boundaries. Adv. Water Resour. 13, 169–186 (1990)
Li, X.S.: Effective stress in unsaturated soil: A microstructural analysis. Géotechnique 53, 273–277 (2003a)
Li, X.S.: Tensorial nature of suction in unsaturated granular soils. In: Proceeding of 16th ASCE Engineering Mechanics Conference, University of Washington, Seattle (2003b) paper No. 708
Scholtès, L., Hicher, P.Y., Nicot, F., Chareyre, B., Darve, F.: On the capillary stress tensor in wet granular materials. Int. J. Numer. Anal. Meth. Geomech. 33(10), 1289–1313 (2009)
Terzaghi, K.: The shear resistance of saturated soils. In: Proceedings of First International Conference on Soil Mech. and Foundation Eng., Cambridge, MA, pp. 54–56 (1936)
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Nikooee, E., Habibagahi, G., Hassanizadeh, S.M., Ghahramani, A. (2012). The Effective Stress in Unsaturated Soils: Insights from Thermodynamics. In: Mancuso, C., Jommi, C., D’Onza, F. (eds) Unsaturated Soils: Research and Applications. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31343-1_1
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DOI: https://doi.org/10.1007/978-3-642-31343-1_1
Publisher Name: Springer, Berlin, Heidelberg
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