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Impact Response of Restrained PMHS in Frontal Sled Tests: Skeletal Deformation Patterns Under Seat Belt Loading
Published November 02, 2009 by The Stapp Association in United States
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This study evaluated the response of restrained post-mortem human subjects (PMHS) in 40 km/h frontal sled tests. Eight male PMHS were restrained on a rigid planar seat by a custom 3-point shoulder and lap belt. A video motion tracking system measured three-dimensional trajectories of multiple skeletal sites on the torso allowing quantification of ribcage deformation. Anterior and superior displacement of the lower ribcage may have contributed to sternal fractures occurring early in the event, at displacement levels below those typically considered injurious, suggesting that fracture risk is not fully described by traditional definitions of chest deformation. The methodology presented here produced novel kinematic data that will be useful in developing biofidelic human models. Additional analysis of the data produced by the reported tests as well as additional tests with a variety of loading conditions are required to fully characterize torso response including ribcage fracture tolerance.
- Stephen A. Ridella - National Highway Traffic Safety Administration
- Erik Takhounts - National Highway Traffic Safety Administration
- Peter Martin - National Highway Traffic Safety Administration
- Greg Shaw - University of Virginia
- Dan Parent - University of Virginia
- Sergey Purtsezov - University of Virginia
- David Lessley - University of Virginia
- Jeff Crandall - University of Virginia
- Richard Kent - University of Virginia
- Herve Guillemot - University of Virginia