DAMAGE MODELLING WITH SMOOTHED POINT INTERPOLATION METHODS
Palavras-chave:
Smoothed Point Interpolation Methods (SPIMs), Meshfree methods, Strain localization, Continuum damage mechanics, Micropolar theoryResumo
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.
