Abstract
Experimental results are presented for fracture tests carried out on concrete and rock specimens under compression, and an analysis is performed for low-frequency acoustic emissions (elastic emissions, or ELE) due to crack growth. ELEs are vibrations of the specimen surface with relevant amplitudes and low frequencies (between 1 kHz and 20 kHz), appearing at the very last stages of the test and then revealing imminent failure. A spectral analysis of the ELEs is performed by measuring with a calibrated transducer the local acceleration of the specimen surface in the application point of the transducer. Quantitative estimation of ELE released energy is given in terms of kinetic energy using a simple kinematic model.
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Schiavi, A., Niccolini, G., Tarizzo, P., Lacidogna, G., Manuello, A., Carpinteri, A. (2011). Analysis of energy released by elastic emission in brittle materials under compression. In: Proulx, T. (eds) Experimental Mechanics on Emerging Energy Systems and Materials, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9798-2_13
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DOI: https://doi.org/10.1007/978-1-4419-9798-2_13
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