Behaviour of Granular Materials in Relation to Their Fabric Dependencies (IWS-ATHENS 2003「地盤力学における予測とシュミレーション手法」特集号)

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概要

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• The roles of dilatancy and fabric on the behaviour of granular materials are both numerically and experimentally explored for the study of material instability and failure. This investigation has two basic ingredients : namely a stress dilatancy model with microstructural information embedded through a fabric tensor, and an experimental rendition of force transmission and structure in an assembly of 2-D photoelastic disks. In order to highlight material instability, model simulations of sand behaviour are carried out in axi-symmetric stress conditions along proportional strain paths with varying degrees of controlled dilation (or compaction) including isochoric deformations as a special case. It is shown that sand, otherwise stable under isochoric (undrained) conditions, can actually succumb to an instability or a liquefaction behaviour under other loading paths. This suggests that flow type of failures in soils may not be necessarily restricted to the classic saturated loose sand case in undrained conditions, but could manifest itself under other conditions as well.

• 社団法人地盤工学会の論文
• 2005-04-15

著者

• Al Mamun

  Dept. Of Civil Engineering University Of Calgary

• WAN RICHARD

  Dept. of Civil Engineering, University of Calgary

• GUO PEIJUN

  Dept. of Civil Engineering, McMaster University

• Guo Peijun

  Mcmaster Univ. Can

• Wan Richard

  Dept. Of Civil Engineering University Of Calgary

• Guo Peijun

  Dept. Of Civil Engineering Mcmaster University

• Al-Mamun Mohammad

  Dept. of Civil Engineering, University of Calgary

関連論文

• Behaviour of Granular Materials in Relation to Their Fabric Dependencies (IWS-ATHENS 2003「地盤力学における予測とシュミレーション手法」特集号)
• EFFECT OF DILATANCY ON INSTABILITY, PRE-INSTABILITY STRAIN SOFTENING OF SAND ALONG PROPORTIONAL STRAIN PATHS

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