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Rahim, M. Zulafif
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article
Effect of triggering angles on the crushing mechanisms of hybrid woven kenaf/aluminum hollow cylinders
Abstract
This paper presents the effect of triggering angles constructed on the top of hybridwoven kenaf/aluminium hollow cylinders on the energy absorption performances. Thecrushing performances of aluminium tubes can be found widely in open literature. However,lack number of work on the hybridizing the aluminium tubes with woven kenaf fibre is found.Woven kenaf mats are produced and bathed with polymeric resin before they are wrappedaround the aluminium tubes twice. Different fibre orientations, +-θ° are used where θ = 0, 15,30 and 45. Once the hybrid composite hardened, one of their end are chamfered using differentangles of 0o, 30o, 45o and 60o. The tubes are quasi-statically compressed in order to obtain theirforce-displacement responses and crashworthiness parameters are extracted and discussed withthe relation of fibre orientations and chamfering angles. It is found that the chamfering anglesare only affected the force-displacement curves during the first stage of elastic deformationwhereas there is no obvious effect in the second stage. However, varying the fibre orientationsare slightly increased the force-displacement curves especially when the fibre is orientatedwith 30o. Based on the fracture mechanism observations, most of composite experienced largefragmentation indicating that the composites absorbed the crushing energy ineffectively.