Auxetic metastructures are advanced structures that, unlike conventional structures, expand in width when stretched in one direction. This characteristic is associated with a negative Poisson's ratio, which enhances their mechanical properties. One method for creating auxetic structures is through 3D printing technology, which allows for the production of complex and precise designs. The aim of the present study is to design and fabricate a novel polymeric auxetic structure using 3D printing technology. The innovative auxetic structure consists of four arrow-head unit cells surrounding a single missing rib unit cell. This structure was designed in SolidWorks, and subsequently, 3D printed samples of the proposed novel auxetic structure were produced. The 3D printed samples of the novel auxetic structure presented were subjected to longitudinal strains ranging from 0% to 25%. The results demonstrated that the 3D printed samples, after being subjected to longitudinal strain, also exhibited an increase in width, confirming that the structure presented in this research is indeed auxetic. The novel auxetic structure presented in this research showed superior performance compared to the auxetic structures introduced in previous studies, achieving a maximum negative Poisson's ratio of -0.54 at 5% longitudinal strain.
