Deformation behaviour of optimised three-dimensional axisymmetric chiral auxetic structuresNovak, Nejc (Avtor) Grebo, Alen (Avtor) Borovinšek, Matej (Avtor) Krstulović-Opara, Lovre (Avtor) Ren, Zoran (Avtor) Vesenjak, Matej (Avtor) auxeticaxisymmetric chiral structures3D printingmechanical testingdeformation behaviouroptimisationBackground/Objectives: Developing functional tissue constructs via 3D bioprinting relies heavily on scaffold architecture, demanding precise mechanical tunability and highresolution feature fidelity. Methods: This paper presents a novel approach utilising photocurable resins and resin 3D printing to fabricate auxetic axisymmetric chiral structures (ACSs), which can be used for advanced scaffold engineering. Results: The experimental tests showed that the optimised ACS (optACS) possess superior mechanical properties compared to their non-optimised counterpart. Both analysed structures possess an auxetic behaviour up to 40% longitudinal strain, with a Poisson’s ratio of about −0.1. Conclusions: This auxetic capability is promising for biomedical applications, particularly in developing enhanced stents or tissue scaffolds.MDPI20252025-12-10 14:20:28Članek v reviji96221UDK: 539.2COBISS_ID: 260741891DOI: 10.3390/biomedicines13112816ISSN pri članku: 2227-9059sl