Speaker(s): Anais Ibourichene
Date: Thursday 11th of July 2019
Location: room G201, ENSG, Nancy
Abstract:
The presence of fractures or cracks in the crust of the Earth is a source of the anisotropy detected by seismic waves.
Previous papers have built analytical solutions or numerical simulations in order to determine how such features can affect the properties of crustal rocks. They evidenced that the impact of fractures and cracks on a background medium depends on characteristics such as their orientation, density or size. These parameters are keys to understand the effective properties of a fractured medium.
However, seismic waves are not sensitive to structures shorter than a certain wavelength. The homogenization method will therefore be used to provide the effective properties in a given 2D/3D model and represent what seismic waves are able to “see” when probing fractures or cracks. In particular, the application of this tool to a fractured medium will allow to determine how the different characteristics of fractures impact a background medium.
During this seminar, the concept of fractured medium in rock mechanics will be first presented. The theory behind the homogenization will then be shortly introduced before presenting its applications and advantages for the purpose of fractured media. Finally, the perspectives of this work will be discussed.