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1 Journal of Theoretical and Applied Mechanics

1 2024

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Ability of localizing gradient damage to determine size effect in concrete beams

Wosatko Adam, Pamin Jerzy, Winnicki Andrzej

Journal of Theoretical and Applied Mechanics

2024

Vol. 62 nr 2

193--206

The objective of the paper is to demonstrate the potential of the localizing gradient dam- age model in size effect simulations. Three different gradient activity functions for variable internal length scale are considered. Numerical simulations for an unnotched beam under three-point bending are referred to the experiment performed by Gr´egoire et al. (2013). A confrontation with the conventional gradient damage model as well as mesh sensitivity studies are also presented. It is proved that the localizing gradient damage model with differ- ent variants of the gradient activity function can reproduce the size effect quite reasonably.