Analysis of structure and strain at the meso-scale in 2D granular materials
作者： Ngoc-Son Nguyen , Hélène Magoariec , Bernard Cambou , Alexandre Danescu
DOI: 10.1016/J.IJSOLSTR.2009.04.019
关键词: Compression (physics) 、 Infinitesimal strain theory 、 Structural engineering 、 Geometry 、 Dilatant 、 Kinematics 、 Strain (chemistry) 、 Granular material 、 Materials science 、 Minor (linear algebra) 、 Scale (ratio)
摘要: In this paper, we introduce a new scale called the meso-scale in order to define an appropriate local for multi-scale kinematic analysis granular materials. The proposed corresponds sub-domains obtained by subdividing 2D assembly taking into account load-bearing contacts. For each sub-domain, strain tensor is defined and description of its structure proposed. Our analysis, carried out on biaxial compression test, reveals that significantly related at meso-scale: (1) major (respectively, minor) principal direction largest within which are elongated minor major) direction, (2) contractancy takes place whereas dilatancy direction. Furthermore, emphasize relation between induced anisotropy materials during deviatoric loading.
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