Development of Shock Absorbing Materials based on Auxetics

Abstract

Porous materials have been used to absorb the shock impact because a longer impact time attenuates the shock impact force. Despite such superior properties, many papers have reported reinforced porous materials by adding inclusions or additives in porous materials because porous materials generally have low shock absorption properties and inferior mechanical properties. For examples, adding a multifunctional material in the porous medium and fabricating a unique optimal microstructure have been considered. However mass production was impossible because the fabrication processes were complicated. Herein, we suggest the auxetic porous materials as a good candidate for shock absorbing applications. Compared with the conventional foam, the suggested auxetic materials have a very good load bearing ability with enhanced shock absorbing property. We expect it to be a good candidate for durable shock absorbing materials in automotive and building industries due to the facile fabrication method and superior properties to solve the aforementioned limitations.