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Experimental study of anisotropy and non-coaxiality of granular solids

机译：颗粒状固体的各向异性和非同轴性的实验研究

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摘要

Previous experimental studies of anisotropy and non-coaxiality by using the hollow cylindrical apparatus are mainly focused on granular soils, which feature irregular particle shapes and non-uniform particle size distributions. This paper experimentally investigates these two characteristics on assemblages of particulate materials with regular particle shapes and uniform particle sizes. These assemblages are made from spherical, cylindrical and cubical particles, with an increasing order of particle angularity. Two types of loading paths in the hollow cylindrical apparatus are applied. One is the monotonic loading path with a range of fixed angles of major principal stress with respect to the horizontal bedding plan, used to investigate the anisotropy of materials. The other is the path of pure principal stress rotations, used to study the non-coaxiality. The experimental results indicate that these three materials exhibit a strong anisotropy and non-coaxiality. Their stress-strain responses are dependent on the orientation of major principal stress. The non-coaxiality is a function of stress ratio. In addition, there is a noticeable trend that these two characteristics are dependent on the angularity of particles. The more angular the particles are, the greater anisotropy and non-coaxiality take place.
机译：以前使用空心圆柱设备进行的各向异性和非同轴性实验研究主要集中在颗粒状土壤上，这些颗粒状土壤具有不规则的颗粒形状和不均匀的粒径分布。本文通过实验研究了具有规则颗粒形状和均一粒径的颗粒材料组装的这两个特性。这些组件由球形，圆柱形和立方体形的粒子制成，并且粒子的角度递增。在空心圆柱形设备中应用了两种类型的加载路径。一种是单调加载路径，该路径具有相对于水平层理计划固定的主要主应力角度范围，用于研究材料的各向异性。另一个是纯主应力旋转的路径，用于研究非同轴度。实验结果表明，这三种材料表现出很强的各向异性和非同轴性。它们的应力应变响应取决于主要主应力的方向。非同轴度是应力比的函数。另外，存在明显的趋势，这两个特性取决于粒子的角度。粒子的角度越多，各向异性和非同轴性就越大。

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  • 来源
    《Granular matter》 |2015年第2期|189-196|共8页
  • 作者

    YunmingYang; Wenbin Fei; Hai-Sui Yu; Jin Ooi; Michael Rotter;

  • 作者单位

    Department of Civil Engineering, International Doctoral Innovation Centre, University of Nottingham Ningbo China, Ningbo, China;

    China Railway Siyuan Survey and Design Group Co., LTD, Wuhan, China;

    Nottingham Center for Geomechanics, University of Nottingham, Nottingham, UK;

    School of Engineering, University of Edinburgh, Edinburgh, UK;

    School of Engineering, University of Edinburgh, Edinburgh, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Anisotropy; Non-coaxiality; Granular solid; Principal stress rotation;

    机译：各向异性非同轴度颗粒状固体;主应力旋转;

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