Damage modelling with smoothed point interpolation methods
Lapo Gori, Samuel Silva Penna, Roque Luiza Da Silva Pitangueira
CILAMCE 2019 - XL Iberian Latin American Congress on Computational Methods in Engineering , Natal , 2019
Resumo (em inglês)
Due to the non-local character embedded in their formulation, meshfree methods belonging to the class of Smoothed Point Interpolation Methods (S-PIMs) have been recently shown to possess certain regularization properties when applied to localization problems. Since meshfree methods usually provide only a weak regularization effect, the combination with other regularization strategies is often necessary. The present work aims to exploit the regularization properties of S-PIMs strategies in the analysis of quasi-brittle media with scalar damage models; a stronger regularization effect is obtained combining the meshfree approach with the micropolar continuum theory, another well-known regularization strategy. The basic theoretical and computational aspects of the application of two S-PIM strategies, the Edge-Based Smoothed Point Interpolation Method (ES-PIM) and Node-Based Smoothed Point Interpolation Method (NS-PIM), to micropolar damage models are discussed, and numerical simulations of two plain concrete experimental tests are presented.