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Journal articles
Large-scale simulations of quasi-brittle microcracking in realistic highly heterogeneous microstructures obtained from micro CT imaging
Abstract : We present large-scale simulations of microcracking initiation and propagation using a continuum mechanics description in realistic, voxel-based microstructures of heterogeneous quasi-brittle materials obtained from CT imaging techniques. The phase field method is used to describe the evolution of the complex microcracks networks in both uniaxial tension and compression of a sub-volume of a lightweight concrete, where all pores and sand grains are explicitly described. A description of the meshing techniques for such complex voxel-based models is provided, and a convergence study of the tensile failure strength with respect to the sample size is carried out. Such large-scale simulations have high potential to be used either within recent concurrent multiscale methods or in approaches combining in-situ experiments with 3D imaging techniques and simulations for inverse identification of microstructural damage models.
Cited literature [25 references]
https://hal-upec-upem.archives-ouvertes.fr/hal-01594674
Contributor : J. Yvonnet Connect in order to contact the contributor
Submitted on : Tuesday, September 26, 2017 - 9:04:05 PM
Last modification on : Tuesday, October 19, 2021 - 4:09:11 PM
Long-term archiving on: : Wednesday, December 27, 2017 - 2:20:30 PM
Contributor : J. Yvonnet Connect in order to contact the contributor
Submitted on : Tuesday, September 26, 2017 - 9:04:05 PM
Last modification on : Tuesday, October 19, 2021 - 4:09:11 PM
Long-term archiving on: : Wednesday, December 27, 2017 - 2:20:30 PM
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