Abstract
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.
Highlights
The dynamic characterization of rocks under high loading rates is fundamental to understand the material behaviour in case of heavy earthquakes and dynamic events
Dynamic compressive and splitting tests were performed at the Laboratory of Dynamic Investigation of Materials in Nizhny Novgorod by means of a Split Hopkinson Pressure Bar (SHPB) shown in figure 3
The high strain-rate tests in tension were performed using a Split Hopkinson Tensile Bar (SHTB) [1], that consists of two circular aluminium bars, called input and output bars, having a length of 3 and 6 m respectively, with a diameter of 20 mm to which the specimen is glued on using a bicomponent epoxy resin
Summary
The dynamic characterization of rocks under high loading rates is fundamental to understand the material behaviour in case of heavy earthquakes and dynamic events. The dynamic characterization has been carried out by means of a traditional Split Hopkinson Pressure Bar (SHPB) and a Split Hopkinson Tensile Bar (SHTB) placed respectively at the Laboratory of Dynamic Investigation of Materials of Nizhny Novgorod and at the DynaMat laboratory of the University of Applied Sciences of Southern Switzerland. This equipment is briefly described and the results of dynamic tension/compression tests at different high strain-rates on several rocks (Carrara marble, Onsernone Gneiss and Peccia Marble) are discussed. Static and dynamic loading tests have been conducted using different experimental set-ups on cylindrical rock specimens with 20 mm in diameter and height/diameter ratio equal to 1
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
