(Peer-Reviewed) Influence of aspect ratio and arrangement direction on the shear behavior of ellipsoids
Weichen Sun ¹, Kai Wu 吴恺 ², Songyu Liu 刘松玉 ², Xiang Zhang 张翔 ²
¹ School of Civil Engineering, Chongqing University, Chongqing 400045, China
中国 重庆 重庆大学土木工程学院
² School of Transportation, Southeast University, Nanjing 210096, China
中国 南京 东南大学交通学院
Abstract
This work studies the macroscopic and microscopic behaviors of ellipsoids under triaxial tests using 3D discrete element method (DEM) simulation. To avoid the boundary effect, a novel stress servo-controlled periodic boundary condition is proposed to maintain the confining pressure of samples during testing. The shape features of ellipsoids are investigated, including the aspect ratio of elongated/oblate ellipsoids and the initial arrangement directions of ellipsoids.
The macroscopic properties of ellipsoidal particle samples, such as the deviatoric stress, volumetric strain, internal friction angle, as well as dilatancy angles are explored. Elongated and oblate ellipsoids with varying aspect ratios are investigated for the occurrence of stick-slips. In addition, it is demonstrated that the initial arrangement direction has a significant impact on the coordination number and contact force chains. The corresponding anisotropy coefficients of the entire contact network are analyzed to probe the microscopic roots of macroscopic behavior.
Data-driven polarimetric imaging: a review
Kui Yang, Fei Liu, Shiyang Liang, Meng Xiang, Pingli Han, Jinpeng Liu, Xue Dong, Yi Wei, Bingjian Wang, Koichi Shimizu, Xiaopeng Shao
Opto-Electronic Science
2024-02-24
Inverse design for material anisotropy and its application for a compact X-cut TFLN on-chip wavelength demultiplexer
Jiangbo Lyu, Tao Zhu, Yan Zhou, Zhenmin Chen, Yazhi Pi, Zhengtong Liu, Xiaochuan Xu, Ke Xu, Xu Ma, Lei Wang, Zizheng Cao, Shaohua Yu
Opto-Electronic Science
2024-01-09
Flat soliton microcomb source
Xinyu Wang, Xuke Qiu, Mulong Liu, Feng Liu, Mengmeng Li, Linpei Xue, Bohan Chen, Mingran Zhang, Peng Xie
Opto-Electronic Science
2023-12-29