Auxetic Structures Analysis: Exploratory Study on Auxetic Materials in Additive Manufacturing

Resumo

Auxetic structures have aroused significant interest in the scientific community due to their unique properties of lateral expansion when subjected to tensile forces, and transverse deformation when subjected to negative Poisson's ratio. This article offers an analysis of these structures, where the theoretical foundations of the negative Poisson's ratio behind auxetic behavior are explored, including the mechanical properties that confer this characteristic. Using SolidWorks Simulation software, mechanical simulations of re-entrant auxetic structures were carried out, and we obtained displacement results equal to 0.690, 0.910 and 1.01 mm, under loads of 150, 200 and 220 kgf respectively. These conditions were reproduced experimentally, resulting in Poisson's ratio at -0,700, -0,622 and -0,500 under each of the previously mentioned loads. Auxetic structures have an example of application in Aeronautics, where they are used in aircraft components to improve impact resistance and energy absorption, increasing passenger safety. In the area of ​​robotics, they also have application to create flexible and resistant components, such as joints and coatings, which can withstand deformations without losing structural integrity.