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Micro-Fracturing and Percolation Theory to Understand the Temporal Evolution of Pre-Fracture Electromagnetic Radiation on Rocks

Clavijo, Jorge Y Wang, Hongqiang Y Sánchez, Sandra Y Sánchez, John (2016) Micro-Fracturing and Percolation Theory to Understand the Temporal Evolution of Pre-Fracture Electromagnetic Radiation on Rocks. In: 13th Annual Meeting of the Asia and Oceania Geosciences Society-AOGS. (In Press)

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Resumen

Pre-fracture electromagnetic signals have been widely detected during rock rupturing experiments in the laboratory. Different models have been proposed to explain the origin and temporal evolution of these signals and their relation with fracture processes. Formation and coalescence of microcracks is one of the main candidates to explain these phenomena. The origin of microcracks is a very complex problem that has been studied from different approaches. Models based on block-spring dynamics,such as one-dimensional lattice models, are capable to explain some key aspects of fracture processes like crack growth instabilities and crack propagation. On the other hand, electromagnetic radiation produced by microcracks is still subject of study; however, one of the principal candidates is the Frid-Rabinovitch-Bahat model. In this model a certain electric charge distribution on cracks surfaces is considered, while keeping the charge neutrality of each surface. The charge oscillation is the origin of the electromagnetic radiation. In this work we analyze the electromagnetic radiation produced by microcracks, merging the one-dimensional lattice model for fractures with the Frid-Rabinowitz- Bahat mechanism. The temporal evolution of the electromagnetic signal is studied assuming coalescence of micro-fractures through the percolation process. Although percolation theory is a pure statistical model, it is the most simplest theoretical frame that contains the basic aspects of critical phenomena related with fractures. The results of the model are compared with some experimental data obtained from fracture of rocks under uniaxial stress.

Tipo de Elemento: Conferencia o Taller artículo (Poster)
Asunto: Q Ciencias > QC Physics
Division: Facultad de Ciencias Exactas y Naturales > Programa de Física > Eventos
Depósito de Usuario: Master Sandra Sánchez Sierra
Fecha Deposito: 07 Jun 2019 14:23
Ultima Modificación: 07 Jun 2019 14:23
URI: http://sired.udenar.edu.co/id/eprint/6036

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