Preliminary experimental study on three-dimensional contact behavior of bonded granules

International Symposium on Geohazards and Geomechanics 2015

地球科学;生态环境科学

Jiang, M.J.^1,2,3 ; Jin, S.L.^1,2,3 ; Shen, Z.F.^1,2,3 ; Liu, W.^1,2,3 ; Coop, M.R.^4

State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai

200092, China^1

Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai

200092, China^2

Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai

200092, China^3

City University of Hong Kong, Hong Kong, Hong Kong^4

关键词: Critical value;    Epoxy adhesives;    Loading devices;    Mechanical contact;    Normal forces;    Size control;    Three-dimensional contact;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/26/1/012007/pdf
DOI  :  10.1088/1755-1315/26/1/012007

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to explore the microscopic contact behaviour of structured sands, devices were developed for specimen preparation and for carrying out tests on mechanical contact behaviour of three-dimensional (3D) bonded spheres. The specimen preparation device can cement two separate aluminium hemispheres by epoxy adhesive with accurate size control. The auxiliary loading devices can carry out compression, tension, shear, bending and torsion tests and any of their combinations. The experimental results show that the peak shear force, bending moment and torque of the bonded hemispheres are normal force dependent; that is, they first increase with the normal force and then decrease after the normal force exceeds a critical value.