期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 61, 期 1, 页码 219-234出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2012.07.008
关键词
Bifurcation; Digital Image Correlation; Heterogeneous sand; Shear band; Strain localization
资金
- US National Science Foundation (NSF) [CMS-0324674, CMMI-0936421]
- Fonds zur Forderung der wissenschaftlichen Forschung (FWF) of Austria [L656-N22]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0936421] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [L656] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [L 656] Funding Source: researchfish
Bifurcation theory is often used to investigate the inception of a shear band in a homogeneously deforming body. The theory predicts conjugate shear bands that have the same likelihood of triggering. For structures loaded symmetrically the choice of which of the two conjugate shear bands will persist is arbitrary. In this paper we show that spatial density variation could be a determining factor for the selection of the persistent shear band in a symmetrically loaded localizing sand body. We combine experimental imaging on rectangular sand specimens loaded in plane strain compression with mesoscale finite element modeling on symmetrically loaded sand specimens to show that spatial heterogeneity in density does have a profound impact on the persistent shear band. (C) 2012 Elsevier Ltd. All rights reserved.
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