To resolve the issues of poor load-carrying performance, high-speed instability and complex structure for airless tires, the re-entrant hexagonal airless tire with negative Poisson’s ratio is proposed. To start with, thickness coefficient \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\alpha$$\end{document}, length coefficient \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\beta$$\end{document}, angle between side unit beam and unit axis, and re-entrant angle of the two sides are regarded as design variables, the calculation model of relative density is derived. Meanwhile, response surface models of specific energy absorption and peak collision force of unit cell are established by constructing finite element models. On this basis, optimal structural parameters can be achieved by adopting genetic algorithm with the objectives of maximum specific energy absorption, minimum peak collision force, and minimum relative density, and with the constraints that length coefficient and thickness coefficient are less than 1 and unit cell is possessed with the characteristic of negative Poisson’s ratio. Subsequently, the effects of various support structural parameters on mechanical properties of airless tires are analyzed and compared with conventional hexagonal honeycomb tire of the same specifications. The results indicate that the energy absorption and 1st modal vibration frequency of proposed airless tire increase by 10.76% and 27.84%, separately. Meanwhile, peak stress and mass decrease by 38.69% and 13.52%, respectively.
Optimization Design of Airless Tire Based on Re-entrant Hexagonal Cellular Structure with Negative Poisson’s Ratio Characteristics
Lect. Notes Electrical Eng.
Society of Automotive Engineers (SAE)-China Congress ; 2022 ; Shanghai, China November 22, 2022 - November 24, 2022
2023-04-29
21 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch