Fracturing damage process in dynamic split experiments of a brittle glass

作     者：Ning Cui Linmao Ye Kaixin Liu 

作者机构：LTCS and Department of Mechanics&Aerospace EngineeringCollege of EngineeringPeking UniversityBeijing 100871China Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2012年第2卷第6期

页      面：9-14页

学科分类：081401[工学-岩土工程] 08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (10732010 10972010 and 11028206) 

主　　题：discrete element method dynamic split test brittle material crack band 

摘      要：In this study, the 3-dimensional discrete element method is firstly introduced to explain the fracturing damage process of the dynamic split experiment of a special brittle glass ZnS. The corresponding dynamic split experiment is also performed by using the split Hopkinson pressure bar. Then the numerical results correspond closely to those obtained by experiments, and the fracturing damage mode shows that the sample under high strain rate loading would crack along vertical diameter in the band region between two loading edges, which differs from the static damage mode. Furthermore, by comparing a group of contrast numerical tests, the numerical results prove that loading area upon the top side of samples would influence the fracture mode of dynamic split experiments, which indicates that the narrow loading plane is better.