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Modeling soil desiccation cracking by analytical and numerical approaches
Abstract : An energy approach is proposed as a complement to the stress approach commonly considered for investigating soil desiccation cracking. The elastic strain energies before and after crack initiation are estimated by both numerical and analytical solutions. The energy released by cracking is then compared with the fracture energy to discuss crack initiation conditions. This leads to combined energy and stress conditions for crack initiation following Leguillon's theory. An approximate analytical solution is derived from a variational formulation of the porous elastic body equations. A cohesive zone model and finite element code are used to simulate crack propagation in an unsaturated porous body. This analysis shows that the energy criterion is reached before the stress criterion, and this can explain unstable crack propagation at the beginning. The approximate analytical solution allows predicting correctly the crack depth and opening in its initiation stage.
Littérature citée [77 références]
https://hal-enpc.archives-ouvertes.fr/hal-02130377
Contributeur : Anh Minh Tang Connectez-vous pour contacter le contributeur
Soumis le : mercredi 15 mai 2019 - 17:22:13
Dernière modification le : mardi 8 décembre 2020 - 10:21:06
Contributeur : Anh Minh Tang Connectez-vous pour contacter le contributeur
Soumis le : mercredi 15 mai 2019 - 17:22:13
Dernière modification le : mardi 8 décembre 2020 - 10:21:06
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