Article Dans Une Revue International Journal of Damage Mechanics Année : 2026

Informing a damage model for fracture of concrete from lattice discrete particle model results

Résumé

Lattice modeling of quasi-brittle materials, such as concrete, is a discrete mesoscale description of the material, where constitutive relations are defined at a lower scale compared to the continuum-based approaches. Over the years, these lattice discrete models have become more and more efficient and it is expected that such models should be helpful to produce high-fidelity databases for complex material responses, informing either data-driven approaches or macroscale models. It is this second possibility which is investigated in this paper. Macroscopic stress and strain responses are obtained by coarse-graining Lattice Discrete Particle Model (LDPM) responses. Stresses and strains are coarse-grained independently from computations on bending beams. Local and nonlocal scalar damage models are used to fit these data. The evolution of damage is constructed from these stress-strain responses by computing the pairs composed of damage and the history variable that govern his growth. Model parameters in the 1 nonlocal model, including the internal length, are then obtained by fitting the macroscale constitutive model to the coarse-grained results. The global response of the bending beam (load versus displacement) and the energy dissipation profiles obtained with the calibrated nonlocal damage model are also found to be consistent with LDPM results.

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Dates et versions

hal-05559418 , version 1 (19-03-2026)

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Julien Khoury, Gianluca Cusatis, Gilles Pijaudier-Cabot. Informing a damage model for fracture of concrete from lattice discrete particle model results. International Journal of Damage Mechanics, 2026, ⟨10.1177/10567895261421295⟩. ⟨hal-05559418⟩
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