期刊
GEOTECHNIQUE
卷 57, 期 5, 页码 449-461出版社
ICE PUBLISHING
DOI: 10.1680/geot.2007.57.5.449
关键词
anisotropy; laboratory tests; plasticity; sands; strain localisation
Laboratory tests on samples of sand typically show instabilities in response related to shear band nucleation and evolution. Influences of constitutive characteristics ( for instance, plastically driven elastic anisotropy), sensitivity to changes in constitutive parameters, and effects of testing conditions ( for instance, related to stress conditions or to membrane penetration or stretching) on different types of material instability occurring in the post-localisation behaviour of sand specimens are investigated. Comparison between model prediction and available experiments shows that certain constitutive and testing features, which do not much influence the global response of a sample, may nevertheless strongly affect the critical and post-critical behaviours. The results obtained show that the proposed approach is general enough to permit the investigation of effects of experimental features that have not previously been studied.
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