Development of Ultra Small Shear-box Test Apparatus indeced in the scanning Electron Microscope

扫描电镜超小型剪切箱试验装置的研制

• 批准号: 61850094
• 负责人: KAMON Masashi
• 金额: $ 4.74万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61850094/
• 关键词: micro deformation; Shear-boc test; kaolinite; 変形; 顕微鏡観測; ダイレイタンシー; 画像処理

In order to obsearve the real microscopic shear deformation process of cloay soils, a new type of the Ultra Samll Shear-box Test Apparatus has been developed. It is designed to be able to control the normal and shear strsses and to observe micro shear deformation and micro dilatancy. Therefor, we can easily compare the micro deformation behaviour with the macro stress- strain properties. The observed behaviout was recorded into VTR and then after analyzed their patterns by a microcomputer.The results obtained, using the dried and consolidated kaolinite samples, are summarized as follows;(1) The recording of the micro deformation behaviout into VTR was obtained successfully.(2) Before the peak shear stress, the particle deformation is only observed locally and the bending stree occurs at the crack point.(3) At the peak shear stress, the dilatancy is amounted the maximum values, and then the main shear surfaces take place independently with the micro hair cracks.(4) At the residual stress, the local deformation is still observed in the only shear surface instead of the constant macro dilatancy.

为了观察粘土真实的微观剪切变形过程，研制了一种新型的超小型剪切盒试验装置。它的设计目的是能够控制法向和剪切应力，并观察微观剪切变形和微观变形。因此，我们可以很容易地比较细观变形行为和宏观应力-应变特性.用干燥固结的高岭石试样，将所观察到的变形行为记录在录像机上，然后用微机分析其图形，所得结果如下：（1）成功地将微变形行为记录在录像机上。(2)在峰值剪应力出现之前，颗粒变形仅发生在局部，弯曲应力发生在裂纹点。(3)在峰值剪应力处，剪切强度达到最大值，主剪切面与微裂纹独立发生。(4)在残余应力作用下，剪切面上的局部变形仍然存在，而不是宏观上的恒定变形。

项目成果

嘉門 雅史: 土木学会関西支部年次学術講演会講演集. 3-18-1-3-18-2 (1987)

Masashi Kamon：日本土木工程师学会关西分会年度学术会议论文集 3-18-1-3-18-2 (1987)。

Masashi Kamon: "Interrelation of micro shear deformation with macro stress- strain behaviour of clay" 22th Annual Meeting of Soil Mechanics and foundation Engineering proceedings. 1. 389-390 (1987)

Masashi Kamon：“粘土微观剪切变形与宏观应力应变行为的相互关系”第 22 届土壤力学和基础工程年会论文集。

嘉門 雅史: "新体系土木学16「土の力学1」" 技報堂出版, 280 (1988)

Kamon Masashi：《新系统土木工程16》土壤力学1》Gihodo Publishing，280（1988）

Masashi Kamon: "Micro Shear deformation behaviour of clay" 42th Annual Meeting of Civil Engineering Proceedings. 3. 10-11 (1987)

Masashi Kamon：“粘土的微剪切变形行为”第 42 届土木工程年会论文集。

Masashi Kamon: "Micro shear deformation mechanism of clay with the Ultra Small Shear-box Test Appsratus" Annaual Meeting of Kansai Branch, civil Engineering Proceesings. 3-18-1-3-18-2 (1987)

Masashi Kamon：“使用超小型剪切箱试验装置的粘土的微剪切变形机制”关西分会年会，土木工程论文集。