Micro-macro modeling approach for the triggering of viscous fatigue damage in halite polycrystals under cyclic loading

A. Pouya, C. Zhu, C. Arson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Underground cavities in salt rock Ibrinations used for Compressed Air Energy Storage (CAES) undergo cyclic loads and are subject to a fatigue phenomenon that induces a decrease of rock's strength and stiffness. A micromechanical analysis of this phenomenon is necessary to understand its mechanisms and elaborate relevant constitutive models. 1'he polycrystallinc nature of rock salt has a crucial ef1ct on crack propagation and rock damage and, hence, on fatigue behavior. This behavior was investigated herein on the basis of self consistent upscaling approaches thr viscous heterogeneous materials. Iiw internal stresses in the polycrystal were modeled based on experimental data available for halite single crystals, and a monotonic compression test was simulated, which allowed tracking the triggering of fatigue damage. Results show (lint tensile stresses are developed in the polyciystal under global compressive load, the amplitude of which depends on the macroscopic load rate or frequency. These tensile stresses can exceed in some conditions the tensile strength of grains or of grains interfaces and cause cracking and damage in the polycrystal.

Original languageEnglish (US)
Title of host publication48th US Rock Mechanics / Geomechanics Symposium 2014
EditorsLee Petersen, Ray Sterling, Emmanuel Detournay, Will Pettitt, Joseph F. Labuz
PublisherAmerican Rock Mechanics Association (ARMA)
Pages1318-1323
Number of pages6
ISBN (Electronic)9781634395236
StatePublished - 2014
Externally publishedYes
Event48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales - Minneapolis, United States
Duration: Jun 1 2014Jun 4 2014

Publication series

Name48th US Rock Mechanics / Geomechanics Symposium 2014
Volume2

Conference

Conference48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales
Country/TerritoryUnited States
CityMinneapolis
Period6/1/146/4/14

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Fingerprint

Dive into the research topics of 'Micro-macro modeling approach for the triggering of viscous fatigue damage in halite polycrystals under cyclic loading'. Together they form a unique fingerprint.

Cite this