Granular media failure along triaxial proportional strain paths

Abstract : This paper revisits a famous phenomenon sometimes observed in granular soils: liquefaction. Liquefaction occurs when all stress components vanish. According to the loading conditions, and the initial void ratio of the soil specimen, it can be shown that a convenient stress quantity passes through a peak, and then decreases. It is usually thought that the deviatoric stress peak also corresponds to a failure state, since a sudden collapse of the specimen is expected from this point according to the loading control adopted. After a brief review of the theoretical background describing the occurrence of such phenomena (liquefaction and failure), the results of laboratory tests run along a triaxial proportional strain loading path are presented. Then, the main conclusions drawn are discussed and confirmed from numerical tests using a discrete element method. In both approaches, it is shown that the choice of the stress response variable is fundamental, in order to properly detect such a failure.
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European Journal of Environmental and Civil Engineering, Ed. Lavoisier, 2013, 17 (9), pp.777-790. 〈10.1080/19648189.2013.819301〉
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https://hal.univ-lorraine.fr/hal-01501441
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Soumis le : mardi 4 avril 2017 - 11:51:40
Dernière modification le : mercredi 12 septembre 2018 - 01:26:58

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François Nicot, Ali Daouadji, Nejib Hadda, Mohamad Jrad, Félix Darve. Granular media failure along triaxial proportional strain paths. European Journal of Environmental and Civil Engineering, Ed. Lavoisier, 2013, 17 (9), pp.777-790. 〈10.1080/19648189.2013.819301〉. 〈hal-01501441〉

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