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Strength and fracture of porous, granular and cellular materials by peridynamic simulations

Abstract : Heterogeneous materials are involved in numerous natural phenomena and industrial applications. Therefore, it is crucial to understand how macroscopic mechanical properties of such materials emerge from underlying micro-structure. To address this topic, numerical simulation approaches are valuable tools,especially when discretization scale is smaller than micro-structure scale. In such a way, the influence of structural parameters can be extensively studied.Among available numerical methods, bond-based peridynamics is a non-local approach which relies on breakable elastic bonds between distant material points within a neighborhood of finite size. As peridynamics is a nonlocal approach, the influence of local mesh anisotropy on crack patterns is significantly reduced, compared with local approaches like lattice elements method.In present study, the bond-based peridynamic approach was implemented in 2D and parallelized by message exchange (MPI). The scalability of the calculation tool and the mesh convergence were tested. Finally, three cases are studied:1) the probability of rupture of porous materials; 2) the evolution of the mechanical properties of a cohesive granular medium for different cementitious matrix contents; 3) the evolution of the damage in various phases of a cellular material as a function of cell wall/interface toughness ratio.
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Contributor : Jean-Yves Delenne Connect in order to contact the contributor
Submitted on : Thursday, September 3, 2020 - 3:00:42 PM
Last modification on : Friday, October 14, 2022 - 3:12:22 AM


  • HAL Id : hal-02929507, version 1


Xavier Frank, Jean-Yves Delenne, Saeid Nezamabadi, Farhang Radjai. Strength and fracture of porous, granular and cellular materials by peridynamic simulations. DEM 8 – 8th International Conference on Discrete Element Methods, Jul 2019, Enschede, Netherlands. ⟨hal-02929507⟩



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