Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/10503
Title: Pressure stimulated currents in rocks and their correlation with mechanical properties
Authors: Stavrakas, I
Triantis, D
Agioutantis, Z
Maurigiannakis, S
Saltas, V
Vallianatos, F
Clarke, M
Keywords: Pressure stimulated current (PSC) technique;Mechanical properties;Marble;Uniaxial stress;Spontaneous electrification
Issue Date: 2004
Publisher: European Geosciences Union
Citation: Natural Hazards and Earth System Sciences, 4: 563 - 567, (2004)
Abstract: The spontaneous electrification of marble samples was studied while they were subjected to uniaxial stress. The Pressure Stimulated Current (PSC) technique was applied to measure the charge released from compressed Dionysos marble samples, while they were subjected to cyclic loading. The experimental results demonstrate that, in the linear elastic region of the sample, no PSC is recorded, while beyond the stress limit (s>0.60), observable variations appear, which increase considerably in the vicinity of sample failure, reaching a maximum value just before the failure. The emitted current is reduced on each loading cycle and it has a reciprocal dependence to the normalized Young modulus. The MCD model, applied out of the vicinity of sample failure explains successfully the above findings. The existence of a "memory-like" behavior of the sample, could justify the weakness or absence of electrical earthquake precursors, during an aftershock sequence.
URI: http://www.nat-hazards-earth-syst-sci.net/4/563/2004/nhess-4-563-2004.html
http://bura.brunel.ac.uk/handle/2438/10503
DOI: http://dx.doi.org/10.5194/nhess-4-563-2004
ISSN: 1684-9981
Appears in Collections:Dept of Computer Science Research Papers

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