A three‐dimensional micromechanically based model

International Journal for Numerical and Analytical Methods in Geomechanics - Tập 41 Số 17 - Trang 1669-1686 - 2017
Hao Xiong1,2, François Nicot1,2, Zhen‐Yu Yin3,4
1Erosion torrentielle neige et avalanches
2Université Grenoble Alpes, IRSTEA, Geomechanics Group, ETNA, Grenoble, France
3Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
4LUNAM University, Ecole Centrale de Nantes, UMR CNRS GeM, Nantes, France

Tóm tắt

SummaryGranular materials react with complicated mechanical responses when subjected to external loading paths. This leads to sophisticated constitutive formulations requiring large numbers of parameters. A powerful and straightforward way consists in developing micro‐mechanical models embedding both micro‐scale and meso‐scale. This paper proposes a 3D micro‐mechanical model taking into account an intermediate scale (meso‐scale) that makes it possible to describe a variety of constitutive features in a natural way. The comparison between experimental tests and numerical simulations reveals the predictive capability of this model. Particularly, several simulations are carried out with different confining pressures and initial void ratios, based on the fact that the critical state is quantitatively described without requiring any critical state formulations and parameter. The model mechanism is also analyzed from a microscopic view, wherein the evolution of some key microscopic parameters is investigated. Copyright © 2017 John Wiley & Sons, Ltd.

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Thông tin xuất bản

International Journal for Numerical and Analytical Methods in Geomechanics

Tập 41 Số 17

1669-1686

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