Skip to Main content Skip to Navigation
Conference papers

QUANTITATIVE INVESTIGATION OF GRAIN BOUNDARY SLIDING IN HALITE ROCK BY SEM IN SITU TESTING AND FULL FIELD STRAIN MEASUREMENTS

Abstract : An experimental investigation of the deformation mechanisms acting in halite at the scale of its polycrystalline microstructure is presented. Uniaxial compression tests on centimetric samples are performed inside the chamber of a scanning electron microscope and the obtained high definition images are processed by digital image correlation (DIC) routines. A special marking procedure provides an appropriate contrast at microscale. Standard DIC routines qualitatively demonstrate the coexistence of two deformation mechanisms: crystal slip plasticity and grain boundary sliding. A specific post-processing of the DIC-evaluated displacement fields provides a first quantification of the relative contribution of these mechanisms to overall strain and a dependence with grain size can be demonstrated. A modified DIC formulation able to separate intra-grain deformation from interfacial gliding is also proposed for a better quantification and preliminary results are presented. Such data will be of primary interest for the construction of physically-based multiscale models of the mechanical properties of halite, which might be used for security assessment of deep caverns in salt-rock. 1.
Document type :
Conference papers
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03336085
Contributor : Alexandre Dimanov Connect in order to contact the contributor
Submitted on : Monday, September 6, 2021 - 6:36:38 PM
Last modification on : Friday, October 8, 2021 - 2:46:04 PM

File

Gaye_etal_photomechanics2013.p...
Files produced by the author(s)

Identifiers

  • HAL Id : hal-03336085, version 1
`

Citation

A Gaye, M Bourcier, E Héripré, M Bornert, A Dimanov, et al.. QUANTITATIVE INVESTIGATION OF GRAIN BOUNDARY SLIDING IN HALITE ROCK BY SEM IN SITU TESTING AND FULL FIELD STRAIN MEASUREMENTS. photomechanics, 2013, Toulouse, France. ⟨hal-03336085⟩

Share

Metrics

Record views

29

Files downloads

24