Abstract
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.
Highlights
With the development of science and technology, high-performance structural materials have become more and more desired in the engineering fields
The quasi-static and dynamic crushing behaviors focusing on the initial peak force and energy absorption of four kinds of open-cell tubes with equal mass and different h/l0 ratios are investigated experimentally based on the polymer materials nylon
The ratio h/l0 ratio is a key parameter for designing the negative Poisson’s ratio (NPR) tube to express its inherent properties
Summary
With the development of science and technology, high-performance structural materials have become more and more desired in the engineering fields In this regard, mechanical metamaterials are increasingly popular in the research community [1,2,3,4,5,6,7]. In order to explore its mechanical properties and promote its practical application in engineering, researchers have proposed various NPR tubes in recent decades. Taking into account the advantages of the NPR CCHTs mentioned above and the rapid development of the 3D-printed technology, this paper aims to explore systematically the mechanical behaviors of NPR CCHTs under quasi-static and dynamic loading conditions through experimental methods. The research in this study is expected to provide a theoretical basis for the optimal design of CCHT, so as to promote this engineering application in the fields of mechanical, medical, aviation, and aerospace industries
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
