The effects of particle shape on the yielding behaviour of crushable sand
The effects of particle shape on the yielding behaviour of crushable sand
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DOI：
10.1016/j.sandf.2020.04.001
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发表时间：
2020-04
影响因子：
3.7
通讯作者：
J. D. de Bono;G. McDowell
中科院分区：
文献类型：
--
作者：
J. D. de Bono;G. McDowell
采用离散元法模拟研究了颗粒形状对砂土塑性特性的影响。这是通过使用四种不同形状的可破碎颗粒来实现的。不同颗粒在遭受各向同性压缩、三轴剪切和一系列应力路径测试时的行为进行了比较，揭示了颗粒形状对行为关键方面的重要作用。根据不同的变形模式建立并分析了屈服面，并表明屈服面取决于颗粒形状。然后得到一个简单的状态边界面，通过对剪切到临界状态的样品进行额外的应力路径测试来证实。
Discrete element method simulations are used to investigate the effects of particle shape on the plastic behaviour of sand. This is achieved by using four different shapes of crushable particles. The behaviours of the different particles when subjected to isotropic compression, triaxial shearing, and a range of stress path tests are compared, revealing the important role of particle shape on key aspects of behaviour. Yield surfaces are established and analysed with respect to different modes of deformation, and are also shown to depend on the particle shape. A simple state boundary surface is then obtained, which is confirmed by a performing an additional stress path test on a sample that had been sheared to a critical state.