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.
Document type :
Journal articles
Complete list of metadatas

Cited literature [25 references]  Display  Hide  Download

https://hal-upec-upem.archives-ouvertes.fr/hal-01594674
Contributor : J. Yvonnet <>
Submitted on : Tuesday, September 26, 2017 - 9:04:05 PM
Last modification on : Thursday, July 18, 2019 - 4:36:07 PM
Long-term archiving on : Wednesday, December 27, 2017 - 2:20:30 PM

File

EML_v7_REVIS.pdf
Files produced by the author(s)

Identifiers

Citation

Thanh Tung Nguyen, Julien Yvonnet, Michel Bornert, Camille Chateau, François Bilteryst, et al.. Large-scale simulations of quasi-brittle microcracking in realistic highly heterogeneous microstructures obtained from micro CT imaging. Extreme mechanics letters, Elsevier, 2017, 17, pp.50-55. ⟨10.1016/j.eml.2017.09.013⟩. ⟨hal-01594674⟩

Share

Metrics

Record views

379

Files downloads

235