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[88390] Artykuł: DETERMINISTIC SIZE EFFECT IN CONCRETE SIMULATED WITH TWO VISCOPLASTIC MODELSCzasopismo: Proceedings of the 6th. European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) ECCM 6, 7th. European Conferenceon Computational Fluid Dynamics ECFD 7 Tom: 1, Zeszyt: 1, Strony: 1199-1210Opublikowano: Styczeń 2019 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Recenzowany referat w materiałach konferencyjnych w języku angielskim Punkty MNiSW: 0 Pełny tekst Keywords: Concrete  Size effect  Viscoplasticity  FEM  |
The paper examines the ability of two selected viscoplastic models to reproduce the
deterministic size effect in plain concrete specimens. The first one is the concrete damaged
plasticity model and it is available in the ABAQUS package. The second one is the Hoffman
viscoplastic consistency model and it is programmed in FEAP. Rate dependency existing in both
models serves as a localization limiter leading to mesh-objective results for reasonably high
values of viscosity, so the reproducing of the deterministic size effect is expected. Numerical
analysis is performed for notched and unnotched beams under three point bending using both
models. Additionally, the results are compared with the experiment made by Grégoire et al.