Initial fabric and uniformity of a sand specimen- an image analysis approach

机译：砂样品的初始结构和均匀性-图像分析方法

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Variations of void ratio and differences in initial fabric within a specimen are principal reasons for the dependence of the presponse of laboratory speciments of granular materials upon the method of sample preparation. This paper describes new procedures which employdigital image processing and analysis techniques to quantify the initial fabric and uniformity of cohesionless soil specimens. For example, variations inthe distribution of voids and particles are quantified using an automated implementation of Oda's local void ratio distribution methodology. The use of image processing methods is illustrated with the results of evaluations on an Ottawa 20-30 sand specimen which had its initial fabric "fixed" using a resin impregnation procedure. The rsults demonstrate that parameters such as uniformity, and initial and evolving fabric can be readily evaluated in an eficient and repeatable manaer using automated image analysis procedures.

机译：空隙率的变化和样品中初始织物的差异是导致颗粒材料的实验室样品的样品标准依赖于样品制备方法的主要原因。本文介绍了采用数字图像处理和分析技术来量化无粘性土样品的初始织物和均匀度的新程序。例如，使用Oda的局部空隙率分布方法的自动化实现，可以对空隙和颗粒分布的变化进行量化。图像处理方法的使用通过对渥太华20-30砂试样的评估结果进行了说明，该试样的初始织物已通过树脂浸渍程序“固定”。结果表明，可以使用自动图像分析程序以高效且可重复的方式轻松评估诸如均匀度，初始织物和不断发展的织物之类的参数。

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《Mechanics of deformation and flow of particulate materials》|1997年|p.214-227|共14页
会议地点 Evanston IL(US)
作者
Chun-Yi Kuo; J.David Frost;
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正文语种 eng
中图分类化学;
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Initial fabric and uniformity of a sand specimen- an image analysis approach

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