In this study a MADYMO(registered trademark) (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(registered trademark) 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.
The effect of leg fracture level and vehicle front-end geometry on pedestrian knee injury and response
Auswirkungen des Grades der Beinfraktur und der vorderen Geometrie des Fahrzeuges auf die Knieverletzung von Fußgängern
2006
13 Seiten, 27 Quellen
Aufsatz (Zeitschrift)
Englisch
Influence of vehicle front geometry on impacted pedestrian kinematics
Kraftfahrwesen | 1984
|Influence of Vehicle Front Geometry on Impacted Pedestrian Kinematics
SAE Technical Papers | 1984
|Predicting Pedestrian Injury Metrics Based on Vehicle Front-End Design
British Library Conference Proceedings | 2015
|Estimation of Knee Injury Measures for a Pedestrian Dummy
British Library Conference Proceedings | 2009
|Estimation of Knee Ligament Injury Measures for a Pedestrian Dummy
SAE Technical Papers | 2009
|