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Volume 10
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Article

Bionic Inner-Tapered Energy Absorption Tube Featuring Progressively Enhanced Fold Deformation Mode

by
Shuang Zhang
1,
Zhengzhi Mu
1,2,*,
Wenda Song
1,
Zhiyan Zhang
1,
Hexuan Yu
1,
Binjie Zhang
3,
Zhiwu Han
1,2,* and
Luquan Ren
1,2
1
Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China
2
Institute of Structured and Architected Materials, Liaoning Academy of Materials, Shenyang 110167, China
3
Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210093, China
*
Authors to whom correspondence should be addressed.
Biomimetics 2025, 10(1), 6; https://doi.org/10.3390/biomimetics10010006
Submission received: 7 December 2024 / Revised: 23 December 2024 / Accepted: 24 December 2024 / Published: 26 December 2024
(This article belongs to the Special Issue Bionic Engineering for Boosting Multidisciplinary Integration: 2nd Edition)
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Abstract

Slender tubes are in high demand owing to their lightweight and outstanding energy absorption. However, conventional slender tubes are prone to catastrophic failures such as Euler’s buckling under axial load. Interestingly, growing bamboos overcome this similar dilemma via a unique tapered intine in the internodes, which endows them with excellent energy absorption. Inspired by this finding, a bionic inner-tapered tube (BITT) was designed to enhance the energy absorption of slender tubes under axial load. The special energy absorption (SEA) was evaluated via a quasi-static axial compression test. Then, theoretical calculation and finite element analysis were carried out to analyze the energy absorption mechanisms. The results reveal that the tapered inner wall induces a progressively enhanced fold deformation mode for BITT, which not only prevents buckling failure and decreases initial peak crushing load but also improves the energy absorption efficiency by increasing plastic deformation. The influences of taper and length–diameter ratio on the axial energy absorption of BITT are explored. Finally, the bionic square array (BSA) and bionic hexagon array (BHA) are fabricated by taking BITT as the basic structural unit, which significantly improves the main energy absorption performance indicators under axial load.
Keywords: energy absorption tube; inner-tapered; bionic design; bamboo internode energy absorption tube; inner-tapered; bionic design; bamboo internode

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MDPI and ACS Style

Zhang, S.; Mu, Z.; Song, W.; Zhang, Z.; Yu, H.; Zhang, B.; Han, Z.; Ren, L. Bionic Inner-Tapered Energy Absorption Tube Featuring Progressively Enhanced Fold Deformation Mode. Biomimetics 2025, 10, 6. https://doi.org/10.3390/biomimetics10010006

AMA Style

Zhang S, Mu Z, Song W, Zhang Z, Yu H, Zhang B, Han Z, Ren L. Bionic Inner-Tapered Energy Absorption Tube Featuring Progressively Enhanced Fold Deformation Mode. Biomimetics. 2025; 10(1):6. https://doi.org/10.3390/biomimetics10010006

Chicago/Turabian Style

Zhang, Shuang, Zhengzhi Mu, Wenda Song, Zhiyan Zhang, Hexuan Yu, Binjie Zhang, Zhiwu Han, and Luquan Ren. 2025. "Bionic Inner-Tapered Energy Absorption Tube Featuring Progressively Enhanced Fold Deformation Mode" Biomimetics 10, no. 1: 6. https://doi.org/10.3390/biomimetics10010006

APA Style

Zhang, S., Mu, Z., Song, W., Zhang, Z., Yu, H., Zhang, B., Han, Z., & Ren, L. (2025). Bionic Inner-Tapered Energy Absorption Tube Featuring Progressively Enhanced Fold Deformation Mode. Biomimetics, 10(1), 6. https://doi.org/10.3390/biomimetics10010006

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