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Student Number 82342010
Author Lai-Song Kuo(郭來松)
Author's Email Address No Public.
Statistics This thesis had been viewed 278 times. Download 11 times.
Department Civil Engineering
Year 1997
Semester 2
Degree Ph.D.
Type of Document Doctoral Dissertation
Language zh-TW.Big5 Chinese
Title A Study on Packing Fabric Evolution of Granular material
Date of Defense 0000-00-00
Page Count 312
Keyword
  • fabric
  • granular material
  • image analysis
  • void ratio
  • Abstract In this study, thin-sections obtained for standard sand
    prepared at different relative density and various stages in
    direct shear test were analyzed using image processing
    techniques to investigate the fabric evolution of particulate
    materials. To provide a numerical means for investigating the
    fabric of particulate material, a program was developed using
    DEM to simulate 3D direct shear behavior of sphere particles.
    The fabric parameters analyzed included void area, void shape,
    and local void ratio, with emphasis on the changes in frequency
    distribution of local void ratio upon shearing.  The results
    indicate that the evolution of local void ratio frequency
    distribution of standard sands and sphere particles, from
    initial to peak shearing stress states, can be characterized by
    a critical void ratio that is equivalent to the average void
    ratio of the initial state. As samples are sheared, the
    frequency distribution of local void ratio less than the
    critical void ratio increases, and that of local void ratio
    greater than the critical void ratio decreases. At both initial
    and peak shearing stress states, can be statistically described
    by the beta distribution. With the increase of the number of
    local void ratio measured, the mean value and standard deviation
    derived on fabric parameters decrease accordingly. It is
    recommended that the number of the local void ratio in a section
    for studying fabric be over 200.
    Table of Content 第一章 前言 1
    1.1 研究動機和目的 1
    1.2 研究方法和步驟 2
    1.3 論文內容 3
    第二章 薄切片製作方法 5
    2.1 薄切片程序 5
    2.2 固定液 7
    2.3 植入設備與方法 10
    2.4 切割 10
    2.5 黏貼11
    2.6 磨平和刨光 11
    第三章 顆粒曹料的形態及組構之文獻回顧 15
    3.1 非凝聚性土壤之顆粒型態 15
    3.2 顆粒材料之組構 20
    3.3 組構模式之文獻回顧 30
    3.4 組構與力學特性 38
    3.5 影響組構的因素 41
    第四章 DEM與應用程式之回顧 47
    4.1 DEM三圍分析之發展 47
    4.2 DEM三圍顆粒分析理論 48
    4.3 堆積應用程式之架構 49
     4.3.1 顆粒與邊界 52
     4.3.2 顆粒與顆粒 56
    第五章 試驗規劃方法與流程 61
    5.1 時程規劃及研究內容 61
    5.2 顆粒材料薄切片之處理程序及相關設備 64
    5.3 擷取影像 67
    5.4 影像處理 71
    5.5 統計分析 75
    5.6 三維直剪試驗程式之模擬 75
    第六章 程式驗證 83
    6.1 圓球與壁面之正向碰撞 83
     6.1.1 圓球與壁面之正向碰撞 83
     6.1.2 圓球與壁面之斜向碰撞 83
    6.2 圓球與圓球之碰撞 87
     6.2.1 圓球之一維彈性碰撞 87
     6.2.2 圓球之二為彈性碰撞 90
     6.2.3 圓球之三維彈性碰撞 92
    6.3 程式模擬直剪試驗之驗證 95
     6.3.1 單層顆粒受剪行為之驗證 95
     6.3.2 多層顆粒受剪行為之驗證 100
    第七章 試驗結果之分析與討論 105
    7.1 試樣物理性質 105
    7.2 試樣之力學性質 105
    7.3 殖入用樹脂特性 108
    7.4 孔隙分析結果與討論 110
     7.4.1 孔隙面積 113
     7.4.2 孔隙形狀因子 121
    7.5 受剪前後區域孔隙比之演化與統計模式 138
    7.6 試體與薄切片試樣孔隙比之比較 144
    7.7 區域孔隙比組構模式之改進與驗證 159
    第八章 三維直剪行為模擬程式之分析結果與討論 169
    8.1 初始狀態之組構 172
    8.2 最大剪應力狀態之組構 180
    8.3 殘餘剪應力狀態之組構 185
    8.4 剪動前後組構之演化 191
    8.5 圓球顆粒剪動前後組構之模式 195
    第九章 薄切片試驗與程式分析結果脂比較和討論 201
    9.1 剪動前後組構演化與組構模式之比較 201
    9.2 切片擷取位置與區域孔隙比量測數對分析結果之影響 201
     9.2.1 標準砂薄切片 201
     9.2.2 圓球顆粒薄切片 205
    9.3 量測之最小區域孔隙比與平面最小區域孔隙比之比較 210
    9.4 薄切片分析法與三維直剪行為模擬程式之展望 216
    第十章 結論與建議 219
    10.1 結論 219
    10.2 建議 220
    參考文獻 223
    --
    附錄A 相對密度試驗(JSTF T26-81T) 229
    附錄B 影像處理之文獻回顧 235
    附錄C GAMMA函數 269
    附錄D 標準砂之薄切片二值化影像 271
    附錄E 程式模擬分析之薄切片影像 291
    附錄F 口試審查委員審查意見及學生答覆 297
    附錄G 作者簡歷 311
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    Advisor
  • Wei-Hsing Huang(黃偉慶)
  • Files No Any Full Text File.
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