Current EuroNCAP test specifications attempt to predict pedestrian lower limb injury in a lateral impact with a rigid legform test device developed by the UK's TRL (Transportation Research Lab). Research shows that the measurements taken from this device (knee bending angle, knee shear, and upper tibia acceleration) do not necessarily correspond to accurate injury prediction. Recent research suggests that the primary improvement to the current test device would be a flexible legform, or one that has more biofidelity (i.e., simulates actual human lower limb response).The work presented in this paper first reviews current legforms developed for pedestrian impact testing, including the TRL impactor used in EuroNCAP tests, Honda's POLAR II pedestrian dummy, and JAMA/JARI's FLEX-PLI legform impactor. Component level testing shows the FLEX-PLI performance to be close to the human lower limb response corridors. However, there are still areas of potential improvement with this design. To address these areas, this research includes the phase 1 development of a new legform impactor incorporating adjustable ligament pre-load, direct ligament strain measurements, adjustability in knee flexion to account for the gait cycle, tuned composite bone cores that match the force-deflection curves of PMHS testing, and a condyle load plate that measures knee joint compressive forces. Development techniques include solid modeling, computer-aided manufacturing, composite design and analysis, sensor specifications, and data acquisition. In so doing, the injury specifications set by the EEVC will be modified to account for the more accurate injury assessment of the improved device.


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    Titel :

    Development of a Biofidelic ‘Legform’ Impact Test Device


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Davis, John (Autor:in) / Schuster, Peter (Autor:in)

    Kongress:

    SAE World Congress & Exhibition ; 2007



    Erscheinungsdatum :

    16.04.2007




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of a Biofidelic `Legform' Impact Test Device

    Davis, J. / Schuster, P. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Development of a biofidelic legform impact test device

    Davis,J. / Schuster,P. / California Polytechnic State Univ.,San Luis Obispo,US | Kraftfahrwesen | 2007


    2007-01-0700 Development of a Biofidelic `Legform' Impact Test Device

    Davis, J. / Schuster, P. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Development of a Biofidelic Flexible Pedestrian Legform Impactor

    Konosu, Atsuhiro / Tanahashi, Masaaki / Japan Automobile Research Institute et al. | SAE Technical Papers | 2003


    Development of a biofidelic flexible pedestrian legform impactor

    Konosu,A. / Tanahashi,M. / Japan Automobile Research Inst.,JP et al. | Kraftfahrwesen | 2003