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首页> 外文期刊>Acta Geotechnica: An International journal for Geoengineering >Influence of relative density, particle shape, and stress path on the plane strain compression behavior of granular materials
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Influence of relative density, particle shape, and stress path on the plane strain compression behavior of granular materials

机译：相对密度，颗粒形状和应力路径对粒状材料平面应变压缩行为的影响

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Two types of stress path-controlled plane strain compression tests were performed on both loose and dense specimens of angular and sub-angular sands and two rounded glass beads with different particle sizes. Digital image correlation method was used to analyze local deformation developments, especially shear band patterns.Thematerial behavior in response to shearing has been found to be dependent on the relative density, particle shape, and stress path. The results of analysis on local deformation developments showed that the onset of shear bands occurred prior to their peak strengths in both dense and loose specimens. The growth rates of local maximumshear strain along a shear band were approximately consistent with an increasing global axial strain after the onset of shear band.The shear bandwidthwas influenced by both the mean particle size and the particle shape. The measured shear band inclination angles were in between those estimated by Coulomb’s and Roscoe’s formulas.
机译：在角和亚角砂的松散和致密试样以及两个具有不同粒径的圆形玻璃珠上，进行了两种类型的应力路径控制的平面应变压缩试验。使用数字图像相关方法分析局部变形发展，特别是剪切带模式。已发现响应剪切的材料行为取决于相对密度，颗粒形状和应力路径。对局部变形发展的分析结果表明，在致密和松动的试样中，剪切带的出现都比其峰值强度先发生。沿剪切带的局部最大剪切应变的增长率与剪切带开始后的整体轴向应变的增加基本一致。剪切带宽受平均粒径和颗粒形状的影响。测得的剪切带倾斜角介于库仑和Roscoe公式估算的范围之间。

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