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Mechanical characterization of rocks at high strain rate

2012; EDP Sciences; Volume: 26; Linguagem: Inglês

10.1051/epjconf/20122601021

2101-6275

Ezio Cadoni, А. М. Брагов, Matteo Dotta, Daniele Forni, A. Yu. Konstantinov, А. К. Ломунов,

High-pressure geophysics and materials

The paper presents the dynamic characterization in tension and compression of three rocks, Carrara marble, Onsernone gneiss and Peccia Marble, at high strain-rates. Two versions of a Split Hopkinson Bar have been used. The version for direct tension tests is installed at the DynaMat Laboratory of the University of Applied Sciences of Southern Switzerland, while the traditional version in compression is installed at the Laboratory of Dynamic Investigation of Materials of Lobachevsky State University. Results of the tests show a significantly strain-rate sensitive behaviour, exhibiting dynamic strength increasing with strain-rate. The experimental research has been developed in the frame of the Swiss-Russian Joint Research Program.