A concave four-arc honeycomb with enhanced stiffness and desirable negative Poisson's effect

Ning Feng; Yuanhao Tie; Ronghui Guo; Qingwen Yuan; Fengling Xue; Cheng Li; Liwen Lv; Weibo Xie

doi:10.1038/s41598-023-48570-y

A concave four-arc honeycomb with enhanced stiffness and desirable negative Poisson's effect

Sci Rep. 2023 Nov 30;13(1):21144. doi: 10.1038/s41598-023-48570-y.

Authors

Ning Feng^{1

2

3}, Yuanhao Tie⁴, Ronghui Guo⁵, Qingwen Yuan⁶, Fengling Xue⁶, Cheng Li⁷, Liwen Lv⁸, Weibo Xie⁹

Affiliations

¹ School of Intelligent Manufacturing and Transportation, Chongqing Vocational Institute of Engineering, Chongqing, 402260, China. fengning@pdsu.edu.cn.
² Henan Province Engineering Research Center of Ultrasonic Technology Application, Pingdingshan University, Pingdingshan, 467000, China. fengning@pdsu.edu.cn.
³ College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi, 830052, China. fengning@pdsu.edu.cn.
⁴ School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China.
⁵ College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Urumqi, 830052, China.
⁶ Henan Province Engineering Research Center of Ultrasonic Technology Application, Pingdingshan University, Pingdingshan, 467000, China.
⁷ School of Intelligent Manufacturing and Transportation, Chongqing Vocational Institute of Engineering, Chongqing, 402260, China.
⁸ School of Resources and Security, Chongqing Vocational Institute of Engineering, Chongqing, 402260, China.
⁹ School of Intelligent Manufacturing and Transportation, Chongqing Vocational Institute of Engineering, Chongqing, 402260, China. xieweibo0907@163.com.

Abstract

The conventional star-shaped honeycomb (CSSH) structure is inherently rich in mechanical properties. Based on the CSSH structure, the Poisson's ratio and Young's modulus can be improved by adding the tip re-entrant angle (ISSH). In this paper, a new concave four-arc honeycomb (CFAH) structure is proposed by designing the straight rod as a curved rod and retaining the tip re-entrant angle from the ISSH structure. The Young's modulus, specific stiffness and Poisson's ratio of CFAH structures are derived from Castigliano's second theorem and Moore's theorem. The theoretical results show good agreement with the numerical and experimental results. The results show that the normalized effective specific stiffness and normalized effective Young's modulus of the CFAH structure are further improved by about 12.95% and 16.86%, respectively, compared with the ISSH structure, and more significant auxiliary effects are obtained. CFAH structures show good promise in aerospace, construction and other applications due to their enhanced mechanical property. Meanwhile, the present work provides guidance for the study of concave four-arc honeycomb structures.

Abstract

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