DEFORMATION MECHANISM OF SAND IN TRIAXIAL COMPRESSION TESTS

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概要

• 論文の詳細を見る

• rights: 社団法人地盤工学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110003913113/Based on detailed observations by using a microscope and thin section method, a new granular model has been proposed as a basis of theoretical considerations on granular mechanics.The specimen deformed to residual stress state can be divided into three subdomains having each homogeneous fabric, i.e., dead domain, dilated domain and shear domain. The void ratio in the dilated domain becomes equal to 20% relative density at peak stress state whose value represents an unstable particle configuration in a granular material. Concentration of directions (N_i) perpendicular to tangential planes at contacts to the maximum principal stress direction performs an essential role in strengthening granular fabric up to the peak stress state. Relative movements between particles in the shear domain occur principally by preferred sliding along the contacts having N_i inclined to σ_1-direction about 35°, and partially by rolling of each grain to reorient preferred dimensional orientation. Mobilized stress ratio of granular materials when subjected to a deviatoric stress state is found to depend not only upon the interparticle friction angle between grains φ_μ but also upon the parameter representing fabric anisotropy S_z/S_x. Experiments on two kinds of sand show that theoretical equation is closely obeyed by experimental results throughout deformation to failure irrespective of their initial void ratio and initial fabric.

• 社団法人地盤工学会の論文
• 1972-12-15

著者

• 小田 匡寛

  Dept. Of Foundation Engineering Faculty Of Engineering Saitama University

• 小田 匡寛

  Department Of Foundation Engineering Saitama University

関連論文

• ELASTIC COMPLIANCE FOR ROCK-LIKE MATERIALS WITH RANDOM CRACKS
• ELASTIC COMPLIANCE FOR ROCK-LIKE MATERIALS WITH RANDOM CRACKS
• FABRIC TENSOR FOR DISCONTINUOUS GEOLOGICAL MATERIALS
• 浅い基礎の支持力問題における進行性破壊の意味
• On the Influence of Progressive Failure on the Bearing Capacity of Shallow Foundations in Dense Sand(ディスカッション)
• 単純セン断試験におけるτ/σ_N=κ・tanψ関係について
• 単純セン断試験における砂のストレス・ダイレイタンシー関係について
• ON THE RELATION τ/σ_N=κ・tanψ IN THE SIMPLE SHEAR TEST
• CO-ORDINATION NUMBER AND ITS RELATION TO SHEAR STRENGTH OF GRANULAR MATERIAL
• 粒状体材料の一つの力学的・統計的モデル
• ON THE RELATION τ/σ_N=κ・tanψ IN THE SIMPLE SHEAR TEST
• ON STRESS-DILATANCY RELATION OF SAND IN SIMPLE SHEAR TEST
• A MICROSCOPIC STUDY ON SHEAR MECHANISM OF GRANULAR MATERIALS
• 三軸圧縮試験における砂の変形メカニズム
• THE MECHANISM OF FABRIC CHANGES DURING COMPRESSIONAL DEFORMATION OF SAND
• 圧縮変形による構造変化のメカニズム
• 粒状体としての砂の構造および力学的性質と構造との関係について
• INITIAL FABRICS AND THEIR RELATIONS TO MECHANICAL PROPERTIES OF GRANULAR MATERIAL
• A MECHANICAL AND STATISTICAL MODEL OF GRANULAR MATERIAL
• DEFORMATION MECHANISM OF SAND IN TRIAXIAL COMPRESSION TESTS
• THE MECHANISM OF FABRIC CHANGES DURING COMPRESSIONAL DEFORMATION OF SAND
• EFFECT OF STRENGTH ANISOTROPY ON BEARING CAPACITY OF SHALLOW FOOTING IN A DENSE SAND
• EXPERIMENTAL STUDY OF ANISOTROPIC SHEAR STRENGTH OF SAND BY PLANE STRAIN TEST
• STRESS-INDUCED ANISOTROPY IN GRANULAR MASSES
• ROTATION OF PRINCIPAL STRESSES IN GRANULAR MATERIAL DURING SIMPLE SHEAR
• MICROSCOPIC DEFORMATION MECHANISM OF GRANULAR MATERIAL IN SIMPLE SHEAR
• SHEAR STRENGTH OF UNDISTURBED SAMPLE OF DECOMPOSED GRANITE SOIL
• マサ土の乱さない試料のセン断強度(『土質工学会論文報告集』Vol.16,No.1(1976年3月発行)掲載論文の概要)
• SHEAR STRENGTH OF UNDISTURBED SAMPLE OF DECOMPOSED GRANITE SOIL
• THE EFFECT OF CRACK GEOMETRY ON HYDRODYNAMIC DISPERSION IN CRACKED MEDIA
• INITIAL FABRICS AND THEIR RELATIONS TO MECHANICAL PROPERTIES OF GRANULAR MATERIAL

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