Response of a Sandwich Plate with Auxetic Anti-tetrachiral Core to Puncture
[ 1 ] Instytut Mechaniki Stosowanej, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | [ D ] phd student | [ P ] employee
chapter in monograph / paper
- Sandwich plates
- Finite element method
EN Auxetic materials and structures have unique properties thanks to their negative Poisson’s ratio resulting from specific micro- or macrostructure. They are known to have superior resistance to dynamic loads in many cases. This includes fatigue, fracture, vibrations, blasts, and impacts. However, this topic still requires further research since there are several types of auxetics and the effect of their Poisson’s ratio on the response to various dynamic loads can be unexpected. In this article, impact tests were performed using the finite element method. The behavior of two sandwich plates was compared. The first plate had an auxetic anti-tetrachiral core while the other one, used for reference, was not auxetic and had a hexagonal honeycomb core. The goal was to find out whether this type of auxetic structure can be used for improved puncture protection or not. The results obtained from numerical simulations definitely confirm that the auxetic plate has the potential to replace its hexagonal honeycomb counterpart that could be used as shielding in various demanding applications.
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