Application of the Discrete Element Method to crack propagation and crack branching in a vitreous dense biopolymer material. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Solids and Structures Année : 2012

Application of the Discrete Element Method to crack propagation and crack branching in a vitreous dense biopolymer material.

Résumé

Crack propagation in a vitreous biopolymer material is simulated using the Discrete Element Method (DEM), which models the brittle material as an assembly of particles bonded together. The simulations are compared to experiments combining a high-speed camera monitoring of crack branching together with a micromechancial testing of samples where local mixture mode is generated by introducing a stress concentrator. Our experimental results show unstable crack propagation and branching occurring upon crack deviation by the action of the stress concentrator. The validity of the DEM simulations is checked by comparing its result to the Finite Element Method (FEM) and to an analytical expression under similar conditions. DEM results show a higher sensitivity to mixed mode compared to FEM and a better match with the analytical formulation. Finally, crack branching is correctly predicted using DEM without any specific criterion for the initiation of secondary cracks.

Domaines

Matériaux

Dates et versions

hal-00747483 , version 1 (31-10-2012)

Identifiants

Citer

L. Hedjazi, C.L. Martin, S. Guessasma, G. Della Valle, R. Dendievel. Application of the Discrete Element Method to crack propagation and crack branching in a vitreous dense biopolymer material.. International Journal of Solids and Structures, 2012, 49 (13), pp.1893-1899. ⟨10.1016/j.ijsolstr.2012.03.030⟩. ⟨hal-00747483⟩
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