Modelling mechanical consequences of erosion
Modelling mechanical consequences of erosion
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DOI：
10.1680/geot.2010.60.6.447
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发表时间：
2010-06
期刊：
影响因子：
5.8
通讯作者：
D. Wood;K. Maeda;E. Nukudani
中科院分区：
文献类型：
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作者：
D. Wood;K. Maeda;E. Nukudani
土壤中细颗粒的内部侵蚀过程使土壤的级配逐渐变窄。侵蚀的机械后果的连续模型的发展已经从各种等级的圆盘组件的二维离散元分析中获得了灵感。在这些分析中描述了侵蚀过程，即在保持样品处于恒定应力下的同时逐渐去除较细的颗粒。颗粒的去除产生比容的增加，因为固体的体积减少而空隙的体积增加，但是较松散的结构在外部应力下压缩。平行连续介质模型采用了以临界州线为中心的畸变硬化模型，并加入了体积变形机制来描述压缩过程。离散元模拟分析及其它结果提醒我们，缩窄级配的一阶效应是提高了级配的稳定性。
The process of internal erosion of fine particles from a soil progressively narrows the grading of the soil. Development of a continuum model for the mechanical consequences of erosion has taken inspiration from two-dimensional discrete element analyses of assemblies of circular discs of various gradings. The process of erosion has been described in these analyses by progressively removing the finer particles while maintaining the sample under constant stresses. The removal of particles produces an increase in specific volume because the volume of solid decreases and the volume of void increases, but the looser structure compresses under the external stresses. Parallel continuum modelling takes an existing distortional hardening model, in which the critical state line plays a central role, and adds a volumetric deformation mechanism to describe the observed compression. The discrete element modelling analyses and other results remind us that the first-order effect of narrowing grading is the raising of th...