Optimum design of composite material engine hood based on pedestrian head protection

doi:10.16265/j.cnki.issn1003-3033.2017.12.008

Abstract

Abstract: In order to study the pedestrian protection performance of polypropylene composite engine hood, a finite element model was built for an engine hood and pedestrian head impactors were built for children and adults by using ANSA software. Collision risk points were identified according to the requirements of EC 78/2009 directive. The pedestrian protection ability and static stiffness of both the polypropylene composite engine hood and the steel engine hood under the same structure condition were studied by LS-DYNA finite element analysis software. Effects of composition of the composite material on the energy absorption characteristics and the related acceleration values of head impact damage of the engine hood were examined. The hinge was improved. The results show that the new polypropylene composite engine hood has an obvious weight reduction effect under the condition that the rigidity was ensured, and that it can provide better protection to the pedestrian head.

Key words: engine hood, composite material, pedestrian protection, head impactors, crash simulation, structure optimization

CLC Number:

DU Xuejing, WANG Yiqun. Optimum design of composite material engine hood based on pedestrian head protection[J]. China Safety Science Journal, 2017, 27(12): 43-48.

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