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Orthotropic Laminated Open-cell Frameworks Retaining Strong Auxeticity under Large Uniaxial Loading
Hiro Tanaka1, Kaito Suga1, Naoki Iwata1
1Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Scientific Reports
|January 5, 2017
Summary
This study introduces a novel anisotropic material with remarkable mechanical properties, demonstrating significant auxeticity. This engineered framework offers potential for advanced material design through geometric principles.
Area of Science:
- Materials Science
- Mechanical Engineering
- Biomaterials
Background:
- Anisotropic materials are prevalent in biological tissues and engineered structures.
- Sophisticated design is crucial for optimizing the performance of these materials.
Purpose of the Study:
- To present a novel laminated open-cell framework with anisotropic properties.
- To investigate its mechanical performance, particularly auxeticity.
Main Methods:
- Fabrication of artificial frameworks using additive manufacturing.
- Lamination of in-plane orthotropic microstructures.
- Uniaxial loading tests and finite element simulations.
Main Results:
- The fabricated structure exhibits orthogonal anisotropy in 3D space.
- Strong auxeticity (negative Poisson's ratios) was observed in the out-of-plane direction.
- Auxetic behavior was reproducible up to the nonlinear elastic region under tension and compression.
Conclusions:
- The findings support the potential of geometric design for creating advanced anisotropic materials.
- The developed framework shows promising mechanical performance, including significant auxeticity.
- This research opens new avenues for conceptual materials design.
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