Title: Acoustic Emissions at High and Low Frequencies During Compression Tests in Brittle Materials.
Authors: Schiavi, A.; Niccolini, G.; Tarizzo, P.; Carpinteri, A.; Lacidogna, G.; Manuello, A.
Abstract: The damage process in a concrete specimen subjected to uniaxial compression test is investigated by detection of the propagating elastic waves because of micro- and macrocrack growth. Besides the high-frequency acoustic emissions (AEs), the presence of low-frequency elastic emissions (ELEs), from 1 to 10 kHz, is detected just before the specimen failure. A spectral analysis of the ELEs is performed by measuring with a calibrated transducer the local acceleration of the specimen surface. Quantitative information about the macrocrack effects in terms of released energy is thus obtained. Furthermore, the evolution of damage is followed through the analysis of the amplitude distribution of AE and ELE signals, distributed according to the Gutenberg-Richter (GR) statistics.
Subjects: MATERIALS compression testing; ACOUSTIC emission testing; MASONRY; FRACTURE mechanics; SURFACE fault ruptures; STRUCTURAL health monitoring
Publication: Strain, 2011, Vol 47, p105
ISSN: 0039-2103
Publication type: Academic Journal
DOI: 10.1111/j.1475-1305.2010.00745.x

Acoustic Emissions at High and Low Frequencies During Compression Tests in Brittle Materials.

Schiavi, A.; Niccolini, G.; Tarizzo, P.; Carpinteri, A.; Lacidogna, G.; Manuello, A.