Triple Stiffness: A Bioinspired Strategy to Combine Load-Bearing, Durability, and Impact-Resistance.

Advanced Science
Ali KhaheshiHamed Rajabi

Abstract

Structures with variable stiffness have received increasing attention in the fields of robotics, aerospace, structural, and biomedical engineering. This is because they not only adapt to applied loads, but can also combine mutually exclusive properties. Here inspired by insect wings, the concept of "triple stiffness" is introduced and applied to engineering systems that exhibit three distinct deformability regimes. By implementing "flexible joints," "mechanical stoppers," and "buckling zones," structures are engineered to be not only load-bearing and durable, but also impact-resistant. To practice the performance of the design concept in real-life applications, the developed structures are integrated into 3D printed airplane wing models that withstood collisions without failure. The concept developed here opens new avenues for the development of structural elements that are load-bearing, durable, and impact-resistant at the same time.

References

Oct 13, 2005·Nano Letters·Himadri S GuptaPeter Fratzl
Sep 15, 2011·Journal of Morphology·Seth DonougheStacey A Combes
Oct 14, 2011·Bioinspiration & Biomimetics·Esther Appel, Stanislav N Gorb
Oct 25, 2011·Nature Materials·Robert O Ritchie
May 29, 2015·Nature·Dario Floreano, Robert J Wood
Sep 8, 2017·Proceedings. Mathematical, Physical, and Engineering Sciences·Gaetano ArenaAlberto Pirrera
Apr 16, 2020·Soft Robotics·Yashraj S NarangRobert D Howe
Jul 25, 2018·Science Robotics·Stefano MintchevDario Floreano
May 1, 2019·Smart Materials & Structures·Nicholas B CramerKenneth C Cheung

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