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Deformation Behaviour of Optimised Three-Dimensional Axisymmetric Chiral Auxetic Structures
Nejc Novak1, Alen Grebo2, Matej Borovinšek1
1Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
Biomedicines
|November 27, 2025
Summary
Researchers developed novel 3D printed auxetic axisymmetric chiral structures (ACSs) for tissue scaffolds. These advanced scaffolds exhibit superior mechanical properties and auxetic behavior, showing promise for biomedical applications like enhanced stents.
Area of Science:
- Biomaterials Engineering
- Additive Manufacturing
- Tissue Engineering
Background:
- 3D bioprinting functional tissue constructs requires precise scaffold architecture.
- Scaffold design must balance mechanical tunability with high-resolution feature fidelity.
Purpose of the Study:
- To present a novel method for fabricating auxetic axisymmetric chiral structures (ACSs) using photocurable resins and resin 3D printing.
- To evaluate the mechanical properties and auxetic behavior of these novel structures for advanced scaffold engineering.
Main Methods:
- Fabrication of auxetic axisymmetric chiral structures (ACSs) utilizing photocurable resins and resin 3D printing.
- Experimental mechanical testing to assess properties of optimized ACS (optACS) against non-optimized counterparts.
- Analysis of auxetic behavior and Poisson's ratio under longitudinal strain.
Main Results:
- Optimized ACS (optACS) demonstrated superior mechanical properties compared to non-optimized structures.
- Both ACS designs exhibited auxetic behavior up to 40% longitudinal strain.
- A consistent Poisson's ratio of approximately -0.1 was observed for the auxetic structures.
Conclusions:
- The auxetic capability of the fabricated ACSs is highly promising for biomedical applications.
- These structures show potential for use in developing enhanced medical stents.
- The developed ACSs could significantly advance tissue scaffold engineering.
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