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[2022-Vol.19-Issue 2]Pomelo Peel-Inspired 3D-Printed Porous Structure for Efficient Absorption of Compressive Strain Energy
Post: 2022-04-08 10:54  View:176

Journal of Bionic Engineering (2022) 19:448–457  https://doi.org/10.1007/s42235-021-00145-1 

Pomelo Peel-Inspired 3D-Printed Porous Structure for Efcient Absorption of Compressive Strain Energy 

Baisong Yang1  · Wenhui Chen1  · Renlong Xin2  · Xiaohong Zhou1  · Di Tan1  · Chuan Ding1  · You Wu1  · Liang Yin1  · Chuyang Chen1  · Shan Wang3  · Zhenglei Yu2  · Jonathan T. Pham4  · Sheng Liu1  · Yifeng Lei1  · Longjian Xue1

1 School of Power and Mechanical Engineering, The Institute of Technological Sciences, Wuhan University, South Donghu Road 8, Wuhan 430072, Hubei, China
2 State Key Laboratory of Automotive Simulation and Control and Key Lab of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China
3 School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
4 Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA 

Abstract  The porous structure in pomelo peel is believed to be responsible for the protection of its fruit from damage during the free falling from a tree. The quantitative understanding of the relationship between the deformation behavior and the porous structure could pave the way for the design of porous structures for efcient energy absorption. Here, a universal feature of pore distribution in pomelo peels along the radial direction is extracted from three varieties of pomelos, which shows strong correlation to the deformation behavior of the peels under compression. Guided by the porous design found in pomelo peels, porous polyether-ether-ketone (PEEK) cube is additively manufactured and possesses the highest ability to absorb energy during compression as compared to the non-pomelo-inspired geometries, which is further confrmed by the fnite element simulation. The nature-optimized porous structure revealed here could guide the design of lightweight and high-energy dissipating materials/devices. 

Keywords  Bionic design · Pomelo peel · Porous structure · 3D printing · Energy absorption

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Morphology and mechanical properties of pomelo peels. a Longitudinal sections of Pingshan Yu (PSY), Shatian Yu (STY) and Ta-Koi (TK). Every fruit is equally divided into three parts: top, middle and bottom parts. b Compressive stress–strain curves of fresh (PSY, STY and TK) and freeze-dried (PSYd, STYd and TKd) pomelo peels. c–e Elastic modulus (c), water content (d) and cellulose content (e) of pomelo peels. d One-way analysis of variance (ANOVA) test, *> 0.05, **0.001 < < 0.05, ***≤ 0.001. The box plot in (e) is shown with median (horizontal center line), average (center point), interquartile range (IQR) (box edges), and 1.5×IQR (whiskers), respectively. Values are means ± s.d

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