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Microscopic study on stress-strain relation of granular materials
  • ISSN号:1001-6538
  • 期刊名称:科学通报(英文版)
  • 时间:0
  • 页码:4349-4357
  • 语言:中文
  • 分类:TU452[建筑科学—岩土工程;建筑科学—土工工程] O424[理学—声学;理学—物理]
  • 作者机构:[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China, [2]Department of Civil Engineering, Beihang University, Beijing 100191, China, [3]State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • 相关基金:Supported by the National Natural Science Foundation of China (Grant Nos. 10672050, 10872016)
  • 相关项目:岩土的材料各向异性与K0固结特性的耦合及其本构描述
中文摘要:

小粒的材料上的二轴的砍测试被不同元素方法(DEM ) 数字地模仿。小粒的材料的微观结构的进化在各向同性的压缩期间并且砍被调查,在哪个上收益功能被导出。新收益函数让那个在修改凸轮泥土使用了的一种类似的形式当模特儿并且在各向同性的压缩下面向收益解释小粒的材料的特征并且砍通过接触的变化的过程在粒子接触角度 θ 定义接触的分发 N (θ ) 。

英文摘要:

A biaxial shearing test on granular materials is numerically simulated by distinct element method (DEM). The evolution of the microstructures of granular materials during isotropic compression and shearing is investigated, on which a yield function is derived. The new yield function has a similar form as the one used in the modified Cam-clay model and explains the yield characteristics of granular materials under the isotropic compression and shear process through the change of the contact distribution N(θ) defining the contacts at particle contact angle θ.

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