Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental investigation on energy absorption of auxetic tubes under quasi-static compression loads
Submission Author:
Rafael Augusto Gomes , MG
Co-Authors:
Adrien Noël , Rafael Augusto Gomes, Lucas Antonio de Oliveira, Matheus Brendon Francisco, Guilherme Ferreira Gomes
Presenter: Rafael Augusto Gomes
doi://10.26678/ABCM.COBEM2023.COB2023-0196
Abstract
Auxetic structures are known to have a negative Poisson's ratio, which has some improved properties when compared with conventional structures, such as their extraordinary mechanical properties that stand out due to their high capacity to absorb energy. The current paper aims to investigate and evaluate the energy absorption behavior of three different auxetic tubular structures composed of the same diameter and height parameters but different unit cell models: Reentrant, Double-V, and Anti-Trichiral. Due to the difference in the unit cell shape parameters, the weight of the structures was used as a parameter between the structures. The experimental compression under quasi-static load made it possible to compare the auxetic tubular structures using two different types of material. The additive manufacturing process of FDM 3D printing was used to manufacture the structures using PLA and PLA-Carbon filament. In the tests of PLA samples, the structure composed of Double-V unit cells, respectively, presented 66% and 13% greater energy absorption ability compared to Reentrant and Anti-Trichiral. In PLA-Carbon samples, Double-V unit cells demonstrate 28% and 116% higher energy absorption ability compared to Reentrant and Anti-Trichiral, respectively. From the results, we were able to verify the energy absorption properties of the different auxetic cell types when applied to the tubular structure.
Keywords
Auxetic, Tubular structure, Additive Manufacture, Energy Absorption
