Observation of grain motion in the interior of a PSC test specimen by Laser-Aided Tomography
Observation of grain motion in the interior of a PSC test specimen by Laser-Aided Tomography
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通过激光辅助断层扫描观察 PSC 测试样品内部的颗粒运动
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
K. Konagai
中科院分区：
文献类型：
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作者：
T. Matsushima;T. Ishii;K. Konagai
本文提出了激光辅助断层扫描/平面应变压缩 (LAT/PSC) 测试方法，这是一种新的 PSC 测试，允许通过可视化颗粒织物讨论颗粒微观力学。 LAT 技术用于实时可视化颗粒样本的任意横截面。成功开发了一种适用于 LAT 图像的图像处理算法，用于提取 3D 颗粒的不规则周长、其结构以及由负载引起的运动（位移和旋转）。这种微观机械信息与颗粒组合的整体行为（例如应力-应变曲线和剪胀特性）一起对于验证各种经验规则和/或数值模拟非常有用，并且还可以在该领域提供新的物理见解。
This paper presents a Laser-Aided Tomography/plane strain compression (LAT/PSC) testing method, a new PSC test allowing for a discussion of granular micromechanics with visualized granular fabrics. LAT technique is utilized to visualize in real time any arbitrary cross-section of a granular specimen. An image processing algorithm, suited for LAT imageries, was successfully developed to extract irregular perimeters of 3D grains, their fabric, and their motions (displacements and rotations) caused by loading. This micromechanical information together with the overall behavior of the granular assemblage, such as stress-strain curves and dilatancy characteristics, are quite useful for validating various empirical rules and/or numerical simulations, and also for providing new physical insights in this field.