Aggressivity of vehicles of different mass and stiffness in head-on collisions is studied in this paper with the aid of an eight-degrees of freedom, two dimensional lumped-mass simulation model. The model takes into consideration mass and stiffness ratio as the main factors contributing to compatibility of the two colliding vehicles. Other factors like length of crumple zone, offset overlap and speed are also considered. Three injury risk criteria have been considered in this study; delta V or change in velocity of vehicle after impact, maximum acceleration sustained by the passenger compartment throughout impact, and length of deformation sustained by the car front. The most crucial aggressivity parameter is the mass ratio for the delta V criterion. The second and third aggressivity parameters are mass ratio and stiffness ratio for deformation length criterion. A longer crumple zone is proposed for heavier vehicles to provide the required protection for small vehicles involved in head-on collision. It was found that both mass and stiffness ratio have no aggressivity on the partner vehicle when maximum acceleration criterion is used at low impact speeds.
Mass and stiffness aggressivity in frontal collisions
Masse- und Steifigkeitsaggressivität bei Frontalzusammenstößen
1998
8 Seiten, 13 Bilder, 1 Tabelle, 13 Quellen
Conference paper
English
Mass and Stiffness Aggressivity of Vehicles in Frontal Collisions
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