Document Detail

The effect of leg fracture level and vehicle front-end geometry on pedestrian knee injury and response.
MedLine Citation:
PMID:  17236519     Owner:  NLM     Status:  MEDLINE    
In this study a MADYMO (mathematical dynamic modelling) model has been used to identify the influence of leg fracture on the injuries sustained by the pedestrian during front end impact with a vehicle. A factorial study of a MADYMO pedestrian and vehicle model are used to investigate the effect of different leg fracture tolerances, geometry, and vehicle compliance on the criteria measured in the European Enhanced Vehicle-safety Committee (EEVC) pedestrian safety tests. These criteria include knee bending, knee shear response, and lower leg bone (tibia) acceleration. The main study examines the spread of typical values of lower limb tolerance based on reported literature and contrasts the response of weaker, low-strength bones, normal tolerance, and limbs which do not fracture. Results show that knee bending angles and therefore ligament strains are significantly increased when fracture does not occur, and are decreased in bones exhibiting a low-strength response. Bone fracture tolerance is shown to be a significant parameter influencing knee bending. The parameters are compared to show that knee shear is significantly influenced by vehicle bumper compliance and that both criteria are heavily influenced by bumper height. Vehicles with more aggressive geometry, higher bumpers, and larger bumper lead were considered for comparative purposes.
M C Dunmore; R Brooks; N J Madeley; D S McNally
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine     Volume:  220     ISSN:  0954-4119     ISO Abbreviation:  Proc Inst Mech Eng H     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2007-01-22     Completed Date:  2007-02-22     Revised Date:  2009-06-08    
Medline Journal Info:
Nlm Unique ID:  8908934     Medline TA:  Proc Inst Mech Eng H     Country:  England    
Other Details:
Languages:  eng     Pagination:  857-69     Citation Subset:  IM    
School of Mechanical, Materials, and Manufacturing Engineering, University of Nottingham, Nottingham, UK.
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MeSH Terms
Accidents, Traffic*
Computer Simulation
Fractures, Bone / etiology*,  physiopathology*
Knee Joint / physiopathology*
Leg Injuries / etiology*,  physiopathology*
Models, Biological
Risk Assessment
Risk Factors
Tibial Fractures / etiology,  physiopathology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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