Abstract
ABSTRACTThin-walled structures have been widely used as energy absorbers due to their significant advantages on crashworthiness and light weight. Relatively few studies have been reported about thin-walled structures with variable diameter along the longitudinal direction in a nonlinear manner. In this paper, a new functionally graded thin-walled structure with variable diameter (functionally graded tapered tube, FGTT) is introduced; and its crashworthiness is comprehensively discussed in terms of specific energy absorption (SEA) and initial peak crushing force (IPCF). The results show that FGTT is of great advantages on energy absorption over the conventionally straight/tapered circular tubes under the same weight. Then, a parametric study is carried out to investigate the effects of wall thickness, gradient variations of section and diameter range between top and bottom diameters on the crashworthiness of FGTTs. Finally, the multiobjective non-dominated sorting genetic algorithm (NSGA-II) is used to further optimise the FGTTs for maximising SEA and minimising IPCF. The optimal FGTTs are found to have superior crashworthiness and great potential for energy absorber.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
