Articles | Volume 12, issue 10
Research article
20 Oct 2021
Research article |  | 20 Oct 2021

A new finite element approach to model microscale strain localization within olivine aggregates

Jean Furstoss, Carole Petit, Clément Ganino, Marc Bernacki, and Daniel Pino-Muñoz

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Cited articles

Bernacki, M., Logé, R. E., and Coupez, T.: Level set framework for the finite-element modelling of recrystallization and grain growth in polycrystalline materials, Scripta Mater., 64, 525–528, 2011. a
Braun, J., Chéry, J., Poliakov, A., Mainprice, D., Vauchez, A., Tommasi, A., and Daignières, M.: A simple parameterization of strain localization in the ductile regime due to grain size reduction: A case study for olivine, J. Geophys. Res.-Sol. Ea., 104, 25167–25181, 1999. a, b
Castelnau, O., Blackman, D., Lebensohn, R., and Ponte Castañeda, P.: Micromechanical modeling of the viscoplastic behavior of olivine, J. Geophys. Res.-Sol. Ea., 113, B09202,, 2008. a
Castelnau, O., Cordier, P., Lebensohn, R. A., Merkel, S., and Raterron, P.: Microstructures and rheology of the Earth's upper mantle inferred from a multiscale approach, C. R. Phys., 11, 304–315, 2010. a
Chenot, J., Bouchard, P., Fourment, L., Lasne, P., and Roux, E.: Optimization of metal forming processes for improving final mechanical strength, in: COMPLAS XI: proceedings of the XI International Conference on Computational Plasticity: fundamentals and applications, CIMNE, 42–55, 2011. a
Short summary
In the first part of this article, we present a new methodology that we have developed to model the deformation and the microstructural evolutions of olivine rocks, which make up the main part of the Earth upper mantle. In a second part, using this methodology we show that microstructural features such as small grain sizes and preferential grain orientations can localize strain at the same intensity and can act together to produce an even stronger strain localization.