High Strain Rate Dynamic Split Tests of Marble
Song Xiaolin,Xie Heping,Wang Qizhi
(Dept. of Civil Eng. and Applied Mechanics, Sichuan University, Chengdu 610065, China)

Abstract: Flattened Brazilian disc samples were first chosen in the dynamic split tests. The dynamic split tests of marble using both Brazilian disc and fla ttened Brazilian disc were performed at high strain rate with split Hopkins pres sure bar(SHPB) of 100mm diameter. With finite element analysis, dynamic tensile strength for marble was obtained and typical failure modes of the Brazilian disc and the flattened Brazilian disc were analyzed. The results show that the dynamic tensile strength of marble is heightened with increasing strain rate. It is a simple, effective and ideal method to stick strain gages on the center of the sample to gain the dynamic tensile strength for brittle materials. Flattened Brazilian disc outperforms Brazilian one for flexibility and measure effect.
Keywords: marble, dynamic split tests, dynamic tensile strength, Braz ilian disc, flattened Brazilian disc, stress wave.