Evstifeev, Alexey and Cadoni, Ezio and Petrov, Yuri (2012) Incubation time approach to rock dynamic strength characterization. EPJ Web of Conferences, 26. 01041.
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Abstract
The dynamic characterization of rocks under intermediate and high strain rates is fundamental to understand the material behaviour in case of heavy earthquakes and dynamic events. The implementation of material constitutive laws is of capital importance for the numerical simulation of the dynamic processes as those caused by earthquakes. These data are necessary and require experimental techniques able to induce on the rock materials state of loading reproducing the actual dynamic condition. Consider the work [1]. The dynamic characterization has been carried out by means of two special apparatus: the split Hopkinson tension bar and the hydro-pneumatic machine . These equipments are briefly described with a discussion on the results of dynamic tension tests at three different strain rates (0.1, 10, 100 strain/s) on Onsernone Orthogneiss for loading directions 0∘, 45∘ and 90∘ with respect to the schistosity. Results of the tests show a significant strain rate sensitive behaviour, exhibiting dynamic tensile strength increasing with strain rate, up to about two times with respect to the quasi-static conditions in the case of 0∘ and 45∘ orientation and more than three times in the case of 90 at high strain rates.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Subjects: | Engineering Engineering > Civil engineering Engineering > Civil engineering > Structural engineering |
| Department/unit: | Dipartimento ambiente costruzioni e design > Laboratorio SUPSI DYNAMAT |
| Depositing User: | Ezio Cadoni |
| Date Deposited: | 14 Jan 2013 08:14 |
| Last Modified: | 24 Aug 2023 14:00 |
| URI: | http://repository.supsi.ch/id/eprint/1509 |
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