Effect of grain size distribution on the shear properties of sand

Frontiers in Materials

Materials

Yalin Nan¹  Mingjiang Tao²  Kuibin Yang³  Jiangtao Fu³  Chen Guo³  Shaofei Wang³  Rui Guo³  Hong Guo³ 

[1] China Electronic Research Institute of Engineering Investigations and Design, Xi’an, China;Shaanxi Provincial Soil Engineering Technology Research Center, Xi’an, China;Department of Civil and Environmental Engineering, Worcester Polytechnic Institute, Worcester, MA, United States;School of Civil Engineering and Architecture, Shaanxi University of Technology, Hanzhong, China;Research Center of Geotechnical Environment and Geological Hazards Control in Qinling-Daba Mountains, Shaanxi University of Technology, Hanzhong, China;

关键词: sand;    particle size distribution;    shear properties;    discrete element method;    internal friction angle;   

DOI  :  10.3389/fmats.2023.1219765

 received in 2023-05-09, accepted in 2023-06-19,  发布年份 2023

来源: Frontiers

【 摘 要 】

In this study, we investigated the effect of particle size distribution on the shear properties of sand. Direct shear tests were conducted using four types of sand samples with different particle size distributions obtained from standard sand produced by Xiamen ISO Co. Ltd. The results show that the influence of particle size distribution on the internal friction angle was significant. Typically, the internal friction angle increases with increasing the coefficient of non-uniformity (Cu) and decreasing the curvature coefficient (Cc). The discrete element results show that the initial particle size distribution significantly affects the porosity, coordination number, and particle slide fraction. In addition, the grey relation analysis revealed that the sliding fraction and coordination number have the greatest correlation with the internal friction angle. The research results of this study help to understand the changes in particle contact, internal stress, and particle sliding during the shear failure process of sand.

【 授权许可】

Unknown   
Copyright © 2023 Guo, Wang, Guo, Yang, Guo, Fu, Nan and Tao.