Crashworthiness of aluminium tubes; Part 2: improvement of hydroforming operation to increase absorption energy

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Proceedings titleMATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes
Series titleAIP Conference Proceedings; no. 908
ConferenceThe 9th International Conference on Numerical Methods in Industrial Forming Processes, June 17-21, 2007, Porto, Portugal
Pages793798; # of pages: 6
AbstractThe motivation to reduce overall vehicle weight within the automotive sector drives the substitution of lightweight materials such as aluminium alloys for structural components. Such a substitution requires a significant amount of development to manufacture structurally parts such that the energy absorption characteristics are not sacrificed in the event of crash. The effects of the manufacturing processes on the crash performance of automotive structural components must be better understood to ensure improved crashworthiness. This paper presents results of an experimental and numerical investigation of the crash response and energy absorption properties of impacted hydroformed aluminium alloy tubes. Crash experiments on hydroformed tubes were performed using a deceleration sled test at the General Motors Technical Center. Results from axial crush testing showed that an important parameter that influences the energy absorption characteristics during crash was the thickness reduction caused by circumferential expansion of the tube during hydroforming. It was found that that the energy absorption decreased as the corner radius decreased, which results because of increased thinning. Sensitivity studies of end feeding parameters, such as end feed level and profile, were carried out to evaluate their impact on the energy absorption of the aluminium tubes.
Publication date
AffiliationNational Research Council Canada; NRC Industrial Materials Institute
Peer reviewedYes
NRC number48394
NPARC number12754965
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Record identifiera17b66e7-31b8-4be3-becd-822011debbea
Record created2009-10-29
Record modified2016-05-09
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