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- Title
Probing Constitutive Models of Bohus Granite with In Situ Spherical Indentation and Digital Volume Correlation.
- Authors
Shariati, H.; Bouterf, A.; Saadati, M.; Larsson, P.-L.; Hild, F.
- Abstract
Spherical indentation of granite was investigated using Digital Volume Correlation (DVC) aiming at probing constitutive laws of the studied rock. In situ indentation was performed within an X-ray tomograph. Finite element simulations of the problem, using different constitutive models, were carried out and their trustworthiness was assessed thanks to DVC residuals. Three laws were investigated, namely, pure elasticity, then compressible elastoplasticity, and finally compressible elastoplasticity coupled with damage. Frictional contact effects were studied as well. The results show that compressible elastoplasticity should be accounted for to achieve high accuracy of results, and that frictional effects are of importance in terms of damage extent. If macrocrack initiation is also sought, then damage features should be included in the model. Highlights: Spherical indentation of granite was investigated using Digital Volume Correlation. Different constitutive laws were probed and their trustworthiness assessed thanks to registration residuals. Compressible elastoplasticity is to be accounted for to obtain faithful results. Frictional effects are of importance in terms of damage extent. Macrocrack initiation was described with a damage model.
- Subjects
GRANITE; ELASTOPLASTICITY; DAMAGE models; TRUST; HOLOGRAPHY; ELASTICITY
- Publication
Rock Mechanics & Rock Engineering, 2022, Vol 55, Issue 12, p7369
- ISSN
0723-2632
- Publication type
Article
- DOI
10.1007/s00603-022-02991-9