Journal
MECHANICS OF MATERIALS
Volume 69, Issue 1, Pages 106-115Publisher
ELSEVIER
DOI: 10.1016/j.mechmat.2013.09.008
Keywords
Plane Couette shear; Granular media; Cosserat continuum; Microstructure effect
Categories
Funding
- China National Natural Science Foundation [11172088/ A020304]
- 111 project of China Ministry of Education [B13024]
- Australian Research Council Centre of Excellence for Geotechnical Science and Engineering
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Cosserat continuum models have proven to be able to capture microstructural effects in granular materials. This paper studies the modality for determining the microstructural effects related to Cosserat model parameters. The plane Couette shear test is considered with a particular hypoplastic Cosserat continuum model, which consists of two undetermined parameters. The development of the sample deformation in a plane Couette shear test is categorized into three stages. An analytical solution is presented for the initial response, which characterizes the sample response to small strain shear. Numerical results are presented for shear tests at finite strain, which demonstrate the development of a localized zone within the sample. Finally, governing equation is derived and solution is obtained for the steady flow state in a fully developed shear band. These results provide a method for estimating the micro-deformation-related strength parameters in the Cosserat continuum model. (C) 2013 Elsevier Ltd. All rights reserved.
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