Abstract
The aim of this paper was to analyse the influence of airbag deployment delay upon the head of the occupant in the case of frontal collision using simulations in PC Crash and MADYMO dummy as the occupant. The study will also take into account the pretension delay of the seat-belt which is activated along with the airbag. Frontal airbags on both the passenger and the driver were analysed including the occupant kinematics during the collision. Also, to validate the simulation, a comparison was done with a real crash test. We predict that by increasing the delay of deployment, the head acceleration will increase due to the fact the head travels close to the instrument panel/steering wheel, and the force of the airbag will generate a significant acceleration upon the head. To better assess the potential injury of the occupant, the head injury criteria (HIC) will be calculated and correlated with the Abbreviated injury scale (AIS) code.
Highlights
The increasing number of vehicles during the last decades in the urban area, as well as the intensification of congestions in intersections has led to considerable roadaccident recordings [1]
The results of the simulation showed that the variation in the head acceleration resulted in two peaks, the first being the contact between the head and the airbag, and the second one between head and head restraint
In order to assess the severity of injuries suffered by motor vehicle occupants due to delayed deployment of the airbag, it was necessary to carry out 7 simulations
Summary
The increasing number of vehicles during the last decades in the urban area, as well as the intensification of congestions in intersections has led to considerable roadaccident recordings [1]. Road traffic accident research has been conducted over the years in order to study of the dynamic and kinematic behaviour of the occupant in the impact phase as well as the injury assessment [2]. Since the introductions of airbags, lots of lives have been saved in motor vehicles crashes [3]. The airbag provides a good protection for all kinds of crashes (side and frontal) that could seriously injure or kill the occupants of the vehicle [4]. Huere has shown in a study that airbags can reduce head injuries by up to 82% for the 56-65 km / h range. It was demonstrated that in 85% of cases, head injuries were classified as minor injuries [5]
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