文献类型：期刊文献

英文题名：Microscopic Simulation of Expansive Soils and Evolution Laws

作者：Pan, Lin[1];Xia, Jinhong[1];Han, Hongxing[1]

第一作者：潘林

通讯作者：Han, HX[1]

机构：[1]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院土木工程与建筑学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China.|[1107114]新乡学院土木工程与建筑学院;[11071]新乡学院;

年份：2020

卷号：16

期号：6

起止页码：1219-1228

外文期刊名：FDMP-FLUID DYNAMICS & MATERIALS PROCESSING

收录：EI(收录号：20210209757283);Scopus(收录号：2-s2.0-85099028534);WOS:【ESCI(收录号:WOS:000600016000009)】；

基金：This work is financially supported by the National Science Foundation of China (41877251) and the science and technology innovation fund project of Xinxiang University (15ZA06).

语种：英文

外文关键词：Expansive soil; particle flow; parallel-bond; crack

摘要：In this paper, the discrete element method (DEM) is used to study the microstructure of expansive soils. The results of the numerical calculations are in agreement with the stress-strain triaxial test curve that is obtained for a representative expansive soil. Biaxial compression tests are conducted for different confining pressures (50 kpa, 100 kpa, and 150 kpa). Attention is paid to the following aspects: deviatoric stress, boundary energy, friction energy, bond energy, strain energy, kinetic energy, and the contact force between grains when the test specimen is strained and to the effect of the different confining pressures on the internal crack expansion. The results of this research show that the cross-section of the specimen is destroyed along the middle part of the specimen itself. When the confining pressure is higher, the impulse is stronger, and this leads to more effective destruction.