Experimental evidence of the compatibility of the cumulative electromagnetic energy release data, with the hierarchical models for the catastrophic fracturing process

Abstract

Abstract. In this paper, we performed experiments of uniaxial compression of granite samples and recorded time series of electromagnetic pulses during the evolution of the catastrophic fracturing process. The cumulative energy release of the electromagnetic emission (EME) up to the critical point at the moment of rupture was then calculated. It was shown, that the validity of the proposed hierarchy models for the catastrophic fracturing process of composite materials, in analogy to critical phenomena, can be experimentally established not only via acoustic emission data, but via electromagnetic emission data as well. The above conclusion could be a useful tool for the improvement of the earthquake prediction method, based on precursory electromagnetic signals.

Modelling acoustic and electric signals emitted during structural tests in terms of log‐periodic power‐law models

“…The model described by Equation (1) has been already successfully applied on a series of experimental protocols with standardized specimens of relatively simple geometry and small dimensions, made of monocrystalline material or granite, 15,17,18 to describe the energy released through both electromagnetic signals and AEs. For the moment being, however, the model of Equation (1) has not been validated against data obtained from complex structural set-ups; neither has it been attempted to be used for modelling the PSCs generated during the loading and damage procedure.…”