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Fracturation électrique des géomatériaux Etude de l'endommagement et de la perméabilité

Abstract : The purpose of this study is to investigate the evolution of microstructure and transport properties of geomaterials subjected to fast dynamic loads. This dynamic loading is generated by shock waves engended by a pulsed arc electrohydraulic discharge (PAED) under water. The evolution of microcracking and damage is illustrated by the microstructure and the intrinsic permeability of the material. Permeability increases both with the number of shocks and the pressure level. A good correlation between qualitative results of the image analysis from CT scans, performed on specimen before and after the shocks, and permeability is observed. After having exposed the results from an experimental campaign, the developments on the anisotropic damage model of R. Desmorat and a coupling with the permeability are proposed. Finally the whole process is simulated numerically by the codes Europlexus and Cast3M.
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Submitted on : Thursday, March 17, 2011 - 2:45:28 PM
Last modification on : Friday, January 15, 2021 - 9:24:19 AM
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Wen Chen. Fracturation électrique des géomatériaux Etude de l'endommagement et de la perméabilité. Matériaux. Université de Pau et des Pays de l'Adour, 2010. Français. ⟨tel-00577790⟩

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