Design and analysis of the mechanical properties of 3D printed sinusoidal structures with auxetic characteristics

© copyright Environment and Climate Change Canada.The auxetic materials are materials that have abnormal behavior; they have a Poisson's coefficient with a negative sign, unlike conventional materials, which is positive. The Poisson's coefficient determines the relationship between the transverse deformation and the longitudinal deformation of a material when a tension or compression force is applied (Crespo and Montáns, 2018). With auxetic materials, when the longitudinal deformation is positive, the transverse deformation is positive, so we have an expansion of the material (Zhang et al., 2018). This unusual feature makes the study and development of auxetic materials striking because it can have potential applications in various areas such as medical, automotive, armament, sports, among others (Günaydin et al., 2017). Because of the above, in this work, the development of 3D printed auxetic structures with sinusoidal patterns is presented. Six different types of specimens were designed, where the amplitude of the sinusoids was varied to give shape to the auxetic structure. Tension tests were performed in each of them to characterize them.

Design and analysis of the mechanical properties of 3D printed sinusoidal structures with auxetic characteristics Academic Article in Scopus