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Lower extremity injuries in vehicle-pedestrian collisions using a legform impactor model

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第2期11卷 97-105页

作者： A.ABVABI A.NASR A.NOORPOOR M.S.KIASAT Department of Automotive Engineering Iran University of Science and TechnologyTehranIran School of Railway Engineering Iran University of Science and TechnologyTehranIran Faculty of Marine Technology Amirkabir University of TechnologyTehranIran

Though the bumper of a vehicle plays a major role in protecting the vehicle body against damage in low speed impacts, many bumpers, particularly in large vehicles, are too stiff for pedestrian protection. In designing a bumper for an automobile, pedestrian protection is as important as bumper energy absorption in low speed collisions. To prevent lower extremity injuries in car-pedestrian collisions, it is important to determine the loadings that car front structures impart on the lower extremities and the mechanisms by which injury is caused by these loadings. The present work was focused on gaining more insight into the injury mechanisms leading to both ligament damage and bone fracture during bumper-pedestrian collisions. The European Enhanced Vehicle-safety Committee （EEVC） legform impactor model was introduced and validated against EEVCAVG17 criteria. The collision mechanism between a bumper and this legform impactor was investigated numerically using LS-DYNA software. To identify the effect of the bumper beam material on leg injuries, four analyses were performed on bumpers that had the same assembly but were made from different materials.

关键词： Finite element model (FEM) legform impactor Pedestrian safety Lower extremity injury Composite bumper

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