Fracturing damage process in dynamic split experiments of a brittle glass  

作　　者：Ning Cui Linmao Ye Kaixin Liu 

机构地区：[1]LTCS and Department of Mechanics&Aerospace Engineering,College of Engineering,Peking University,Beijing 100871,China [2]Center for Applied Physics and Technology,Peking University,Beijing 100871,China

出　　处：《Theoretical & Applied Mechanics Letters》2012年第6期9-14,共6页力学快报（英文版）

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

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.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.

关 键 词：discrete element method dynamic split test brittle material crack band 

分 类 号：TU472.5[建筑科学—结构工程] TU45[建筑科学—土工工程]