Experimental and numerical approach for the behavior of granular medium within shear band

剪切带内颗粒介质行为的实验和数值方法

• 批准号: 12460105
• 负责人: MURAKAMI Akira
• 金额: $ 3.65万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12460105/
• 关键词: Granular material; Biaxial test; Shear band; Cellular automata; Localization; DEM; Shear test

During this year, a biaxial experiment using aluminum rods is performed and the video record is analyzed through the image processing system to obtain the displacement profile and the change of voids of granular media. New local rule of CL-CA (Connected-Lattice Cellular Automata) is developed to enable us to analyze the behavior of granular assemblage by revising the existing rule for gravitational flow. In the experiment, aluminum rods with the same radius and those with different radii are used to compare the different behavior of circular disks and these behavior is monitored by the high-speed video during 10 seconds. Numerical analysis based on newly developed local rule for the behavior of granules is examined under the dam break problem between predicted loci of disks and those calculated by CIP method. Applicability of the proposed rule is verified through a good agreement within numerical and experimental results.

在这一年中，利用铝棒进行了双轴实验，并通过图像处理系统对视频记录进行分析，获得了颗粒介质的位移分布和空隙变化。发展了新的连通格子元胞自动机(CL-CA)局部规则，使我们能够通过修改现有的重力流动规则来分析颗粒聚集的行为。在实验中，使用相同半径和不同半径的铝棒来比较圆盘的不同行为，并通过高速视频在10秒内对这些行为进行监控。在圆盘运动轨迹预测与CIP方法计算结果之间的溃坝问题下，对基于新发展的颗粒运动局部法则的数值分析进行了检验。数值计算结果与实验结果吻合较好，验证了该准则的适用性。

项目成果

A. Murakami, H. Sakaguchi, T. Takasuka and H. Fujii: "Study of microtopology and its evolution in granular materials using a cellular automata model"Powders & Grains (Kishino, ed.). Vol.1. 33-36 (2001)

A. Murakami、H. Sakaguchi、T. Takasuka 和 H. Fujii：“使用元胞自动机模型研究颗粒材料中的微拓扑及其演化”粉末

村上 章: "討議「密詰め砂地盤において擁壁裏込め土の緩みが受働変位による地盤の進行性破壊および粒子径効果に及ぼす影響」"農業土木学会論文集. 216. 101-102 (2001)

Akira Murakami：“讨论‘挡土墙回填土松动对压实沙地被动位移和颗粒尺寸效应导致的地面渐进破裂的影响’”日本农业和土木工程师学会会刊 216。 101。 -102 (2001)

村上 章: "Study of microtopology and its evolution in granular materials using a cellular automata model"Powders & Grains. 1. 33-36 (2001)

Akira Murakami：“使用元胞自动机模型研究颗粒材料的微拓扑及其演化”Powders & Grains，1. 33-36 (2001)。

松岡明日香: "Stress distribution within granular body"Inverse Problems in Engineering Mechanics. 1. 185-191 (2001)

Asuka Matsuoka：“颗粒体内的应力分布”工程力学反问题。1. 185-191 (2001)。

A. Matsuoka, M. Hori., A. Murakami and S. Aoyama: "Stress distribution within granular body: Stress distribution within granular body"Inverse Problems in Engineering Mechanics (Tanaka & Drikulavich, eds.). Vol.1. 185-191 (2001)

A. Matsuoka、M. Hori.、A. Murakami 和 S. Aoyama：“颗粒体内的应力分布：颗粒体内的应力分布”工程力学反问题（田中