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Comparative FE Analysis of Lower Extremity Injury for Hybrid III, THO/LX, and Human Model in NCAP Frontal Offset Crash
Technical Paper
2005-01-0610
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Crash injuries in lower extremities are usually not fatal but may result in long-term impairment and immobility. Current understanding of these injuries is still quite limited from the biomechanical point of view. It is known that they occur often during frontal offset collisions in which intrusion of the toe pan and instrument panel frequently occur but are not always associated with their causation. Assessment of these injuries using the Hybrid III dummy is limited because of its limited biofidelic structure and inaccurate injury criteria. Accordingly, THOR-LX, the retrofit of the lower leg of the Hybrid III, has been introduced with an improved design for ankle motion and capacity of injury prediction. In this study, the different ankle joint characteristics and outcomes of both the Hybrid III and the THOR/LX have been quantitatively analyzed for an NCAP 40% offset crash with a small size sedan. A sub-structuring scheme of isolating the occupant compartment from the full car crash simulation was adopted in order to facilitate a parametric study in which various levels of structural deformation were utilized. Biomechanical injury assessment with an FE human body model was performed in addition to the dummy models to elucidate the associated injury mechanisms. The results of this study could be practically utilized for quantifying ankle joint injury outcomes from Hybrid III and THOR/LX dummies.
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Authors
Topic
Citation
Ahn, C., Bae, H., Lee, J., Lee, I. et al., "Comparative FE Analysis of Lower Extremity Injury for Hybrid III, THO/LX, and Human Model in NCAP Frontal Offset Crash," SAE Technical Paper 2005-01-0610, 2005, https://doi.org/10.4271/2005-01-0610.Also In
Occupant Safety, Safety-Critical Systems, and Crashworthiness
Number: SP-1923; Published: 2005-04-11
Number: SP-1923; Published: 2005-04-11
References
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- Morgan, R. M. et al 1991 Ankle joint injury mechanism for adults in frontal automotive impact 35th STAPP Car Crash Conference
- Kuppa, S. et al 1998 Axial-Impact Characteristics for Dummy and Cadaver Lower Limbs 16th ESV Conference
- Lestina D. C. et al 1992 Mechanisms of fracture in ankle and foot injuries to drivers in motor vehicle crashes SAE 922515
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- Crandall J. R. et al 1996 Biomechanical response and physical properties of the Leg, Foot and Ankle SAE 962424
- CERTIFICATION PROCEDURE FOR THE THOR-LX/HYBRID III RETROFIT VERSION 3.2 2001 National Highway Traffic Safety Administration, Vehicle Research and Test Center
- H-model user's manual 2002 IPS-I Korea
- Handbook of Numerical Analysis, Volume XII: Computational Models for the Human Body 297 361 Elsevier 2004
- Funk J. R. et al 2000 Linear and quasi-linear viscoelastic characterization of ankle ligaments J Biomech. Eng 122 1 15 22