A numerical analysis of weakening of a granitic rock by piezoelectric excitation of quartz

Arturo Rubio Ruiz, Timo Saksala, Pascal-Alexandre Kane, Mikko Hokka

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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Abstract

This work presents a numerical model to simulate intergranular damage in a granitic rock by oscillating piezoelectric excitation of quartz dispersed in the structure. The damage evolution at grain boundaries was assumed to be related to fatigue and it was modelled using cohesive elements and a damage evolution model formulated in terms of discipation of mechanical work. An explicit
representation of the granular mesostructure was built, and it was subjected to high-voltage alternating-current exitation. The effect of the fatigue damage on the mechanical properties was quantified by simulated tension and compression tests. The numerical results show that the electrical treatment can potentially cause rock weakening due to fatigue, but the model needs to be calibrated with experimental data for a quantitative analysis.
Original languageEnglish
Title of host publicationProceedings of the ISRM 15th International Congress on Rock Mechanics and Rock Engineering & 72nd Geomechanics Colloquium
Subtitle of host publicationChallenges in Rock Mechanics and Rock Engineering
EditorsW. Schubert, A. Kluckner
Pages1852-1857
ISBN (Electronic)978-3-9503898-3-8
Publication statusPublished - 2023
Publication typeA4 Article in conference proceedings
EventISRM International Congress on Rock Mechanics - Salzburg, Switzerland
Duration: 9 Oct 202314 Oct 2023

Conference

ConferenceISRM International Congress on Rock Mechanics
Country/TerritorySwitzerland
CitySalzburg
Period9/10/2314/10/23

Publication forum classification

  • Publication forum level 0

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