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Erschienen in:
2017 | OriginalPaper | Buchkapitel
Strain Localisation in Sand in Cycles of Triaxial Compression and Extension: Continuum and Grain-Scale Analysis
verfasst von : E. Andò, E. Salvatore, J. Desrues, P. Charrier, J.-B. Toni, G. Modoni, G. Viggiani
Erschienen in: Bifurcation and Degradation of Geomaterials with Engineering Applications
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Abstract
In this work we present selected results from a recent experimental programme where small sand specimens are subjected to cycles of triaxial compression and triaxial extension: the material is “yielded” in extension, after which the loading is reversed and the material is “yielded” in compression—a number of cycles are performed. The ways in which extension and compression-like localisation patterns (i.e., dilatant shear banding, and necking respectively) appear, get activated and disactivated on reversal of loading are measured, and discussed—in terms of both (continuum) strain fields and individual grain rotations.