Rock damage estimation with dielectric loss (tan δ) measurements
by C.E. Anastasiadis, I.D. Stavrakas, D.A. Triantis, A.D. Kyriazopoulos, K.D. Ninos
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 1, No. 3/4, 2006

Abstract: In addition to existing non-destructive testing methods a novel technique is presented here. It is based on Dielectric Spectroscopy (DS) methodology for the verification of mechanical damages in geomaterial structures. Such techniques do not influence the material structure or properties, thus it can be re-examined with various methods. In this work damages are introduced in a geomaterial by uniaxial stress isothermally. The damage caused to marble samples and its influences on the dielectric loss angle were examined relative to stress. Results indicate that when stress produces microcracks then tan δ increases and a loss peak appears in the studied frequency range.

Online publication date: Thu, 07-Dec-2006

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