期刊
MATERIALS
卷 14, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/ma14061353
关键词
convex– concave honeycomb tube (CCHT); negative Poisson’ s ratio (NPR); dynamic tests; energy absorption
类别
资金
- Shaanxi Provincial Education Department [18JK0437]
- National Natural Science of China [12072222, 12021002, 11991032]
- State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures [SKLTESKF1901]
- Aeronautical Science Foundation of China [ASFC-201915048001]
This study conducted experimental tests on various 3D-printed NPR convex-concave honeycomb tubes and discussed the factors influencing their mechanical properties such as elastic modulus and peak force. The results showed that through the reasonable design of NPR, CCHTs have better performance compared to CSHTs.
The synthesized understanding of the mechanical properties of negative Poisson's ratio (NPR) convex-concave honeycomb tubes (CCHTs) under quasi-static and dynamic compression loads is of great significance for their multifunctional applications in mechanical, aerospace, aircraft, and biomedical fields. In this paper, the quasi-static and dynamic compression tests of three kinds of 3D-printed NPR convex-concave honeycomb tubes are carried out. The sinusoidal honeycomb wall with equal mass is used to replace the cell wall structure of the conventional square honeycomb tube (CSHT). The influence of geometric morphology on the elastic modulus, peak force, energy absorption, and damage mode of the tube was discussed. The experimental results show that the NPR, peak force, failure mode, and energy absorption of CCHTs can be adjusted by changing the geometric topology of the sinusoidal element. Through the reasonable design of NPR, compared with the equal mass CSHTs, CCHTs could have the comprehensive advantages of relatively high stiffness and strength, enhanced energy absorption, and damage resistance. The results of this paper are expected to be meaningful for the optimization design of tubular structures widely used in mechanical, aerospace, vehicle, biomedical engineering, etc.
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