The effects of the coordination on the fragmentation of a single grain

International Symposium on Geohazards and Geomechanics 2015

地球科学;生态环境科学

Salami, Y.^1 ; Dano, C.^1 ; Hicher, P.-Y.^1 ; Colombo, G.^1 ; Denain, P.^1

Research Institute in Civil and Mechanical Engineering (GeM, UMR CNRS 6183), École Centrale Nantes, Nantes, France^1

关键词: Contact forces;    Coordination number;    Crushing test;    D. digital image correlation (DIC);    Failure forces;    Multiple contacts;    Secondary cracks;    Single grains;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/26/1/012015/pdf
DOI  :  10.1088/1755-1315/26/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The main objective of this study is to understand the effects of the coordination number on the behavior of a single grain, before and during fracture. A new apparatus is designed, with the purpose of conducting multipoint crushing tests, and to investigate the effects of the contacts number, type and position on the failure of a particle. Some of the tests were monitored using digital image correlation (DIC), in order to get an in-depth view into the mechanics of fracture. The fragmentation of the grains was studied, and the cracks were shown to follow specific paths. The failure forces of multiple contact configurations were compared to show the effect of the number and position of contact forces on the primary and secondary cracks. It was shown that the position and magnitude of the contact forces plays a significant role in the fragmentation of the grain.