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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.
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1 Chongqing Vocational Institute of Engineering, School of Intelligent Manufacturing and Transportation, Chongqing, China (GRID:grid.495657.c) (ISNI:0000 0004 6490 6258); Pingdingshan University, Henan Province Engineering Research Center of Ultrasonic Technology Application, Pingdingshan, China (GRID:grid.449268.5) (ISNI:0000 0004 1797 3968); Xinjiang Agricultural University, College of Mechanical and Electrical Engineering, Urumqi, China (GRID:grid.413251.0) (ISNI:0000 0000 9354 9799)
2 Guangxi University of Science and Technology, School of Mechanical and Automotive Engineering, Liuzhou, China (GRID:grid.440719.f) (ISNI:0000 0004 1800 187X)
3 Xinjiang Agricultural University, College of Mechanical and Electrical Engineering, Urumqi, China (GRID:grid.413251.0) (ISNI:0000 0000 9354 9799)
4 Pingdingshan University, Henan Province Engineering Research Center of Ultrasonic Technology Application, Pingdingshan, China (GRID:grid.449268.5) (ISNI:0000 0004 1797 3968)
5 Chongqing Vocational Institute of Engineering, School of Intelligent Manufacturing and Transportation, Chongqing, China (GRID:grid.495657.c) (ISNI:0000 0004 6490 6258)
6 Chongqing Vocational Institute of Engineering, School of Resources and Security, Chongqing, China (GRID:grid.495657.c) (ISNI:0000 0004 6490 6258)