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An experimental study of failure and softening in sand under three-dimensional stress condition

机译:三维应力条件下砂土破坏与软化的实验研究

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摘要

This paper describes an experimental study of failure and softening behaviour in dense Toyoura sand. A true triaxial apparatus equipped with three pairs of rigid loading platens is used to test sand sample under three-dimensional stress condition. The testing results demonstrate that the rigid boundary around the sand samples cannot prevent formation of shear localization. Shear localization are observed to emerge in the hardening or the softening regime in the loading depending on the magnitude of intermediate principal stress. Uniform deformation for the whole strain range is obtained only in triaxial compression tests. The peak stress state obtained from tests of sand samples of the same initial density can be described with good approximation by the Matsuoka-Nakai criterion.
机译:本文描述了稠密丰谷砂中破坏和软化行为的实验研究。配备三对刚性加载台板的真实三轴设备用于在三维应力条件下测试砂样。测试结果表明,砂样品周围的刚性边界不能阻止剪切局部化的形成。根据中间主应力的大小,观察到在载荷的硬化或软化过程中出现剪切局部化。仅在三轴压缩测试中才能获得整个应变范围内的均匀变形。用松冈-中井判据可以很好地描述从相同初始密度的砂样品测试中获得的峰值应力状态。

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  • 来源
    《Granular matter》 |2008年第3期|p.187-195|共9页
  • 作者单位

    Department of Civil Engineering, Shanghai University, 149 Yanchang Road, Shanghai 200072, China;

    rnCentre for Geotechnical and Materials Modelling, The University of Newcastle, Callaghan, NSW 2308, Australia;

    rnDepartment of Civil Engineering, Beijing University of Aeronautics and Astronautics, 34 Xueyuan Road, Beijing 100083, China;

  • 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
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