Hexagonal Hollow Tube Based Energy Absorbing Crash Buffers for Roadside Fixed Objects

[摘要] The purpose of this study was to investigate the deformation of the energy absorbing hexagonal hollow tubes in a lateral compression. The aim is to design cost effective and high energy-absorbing buffer systems, which are capable of controlling out-of-control vehicles in high-speed zones. A nonlinear quasi-static finite element analysis was applied to determine the deformation and energy absorption capacity. The main parameters in the design were diameter and wall thickness of the tubes. Experimental test simulating the lateral compressive loading on a single tube was performed. Results show that as the diameter and the thickness increase, the deformation strength increases. Hexagonal tube with diameter of 219 mm and thickness of 4 mm is shown to have the highest energy absorption capability. Compared to existing cylindrical and octagonal shapes, the hexagonal tubes show the highest energy absorption capacity. Hexagonal tubes therefore can be regarded as a potential candidate for buffer designs in high speed zones. In addition, they would be compact, cost effective and facilitate ease of installation.

[发布机构] School of Engineering, University of South Australia, Mawson Lakes; SA; 5095, Australia^1;Automotive Safety Engineering Pty Ltd, Lonsdale; SA; 5160, Australia^2

[效力级别] 无线电电子学 [学科分类] 航空航天科学

[关键词] Compressive loading;Deformation strengths;Energy absorption capability;Energy absorption capacity;Experimental test;Lateral compression;Main parameters;Octagonal shapes