11th International Scientific Conference Research and Development of Mechanical Elements and Systems IRMES (2025) [pp. 95-99]
AUTHOR(S) / АУТОР(И): Vladimir SINĐELIĆ 
, Snežana ĆIRIĆ-KOSTIĆ , Aleksandar NIKOLIĆ , Nebojša BOGOJEVIĆ
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DOI: 10.46793/IRMES25.095S
ABSTRACT / САЖЕТАК:
This paper presents a numerical investigation of four types of auxetic star-shaped structures: the conventional 2D Arc Star-Shaped (2D-AS), the Improved 2D Arc Star-Shaped (i2D-AS), the newly proposed Tangent 2D Arc Star-Shaped (t2D-AS), and the standard 2D Star-Shaped (2D-SS) structure. By modifying the geometry of the original 2D-AS structure, the t2D-AS variant was developed and analyzed for the first time. All structures were designed to maintain the same geometric parameters, allowing for a consistent comparison of their mechanical properties. Numerical simulations were performed using the finite element method in ANSYS Workbench under periodic boundary conditions, with a focus on evaluating Poisson’s ratio and Young’s modulus. The i2D-AS structure exhibited the highest stiffness due to the use of circular arches, while the t2D-AS structure demonstrated the lowest relative density, making it a promising candidate for lightweight applications. Although its mechanical properties are slightly lower than those of the 2D-SS, the t2D-AS offers a favorable balance between structural efficiency and weight reduction. Future research will focus on the analytical modeling and energy absorption capabilities of the newly proposed structure.
KEYWORDS / КЉУЧНЕ РЕЧИ:
Auxetic structure, Negative Poisson’s ratio, FEM, Young’s modulus, Lightweight design
ACKNOWLEDGEMENT / ПРОЈЕКАТ:
This paper is a result of the research conducted within the project grant number 451-03-137/2025-03/200108 supported by the Ministry of Science, Technology and Innovation of the Republic of Serbia and the CEEPUS project grant “Building Knowledge and Experience Exchange in CFD – RS-1012-10-2425” supported by the Central European Exchange Program for University Studies.
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