ijiMinds

(ISSN: 2349-2082)

International Journal For Ignited Minds
 Published Article
 Title:
An Exploration of Alternate Design of Automotive Front End Structure for Improving both Pedestrian and Occupant Safety Requirements
 Authors:
Jnanesh K , Jeevan G, Imran Ali M.R & Zahoor Ahmed Shariff
 Abstract:
Pedestrian protection is one of the key topics safety measures in traffic accidents all over the world. To analyse the relation between the collision site of the vehicle bumper and the severity of the lower extremity injuries, we performed biomechanical experiments. We found that foam materials around the rigid front cross member had a significant effect on the reducing the lower extremity injury risks especially tibia fracture risk against vehicle bumper centre collisions. Because of rapid increase in urban population and hence road traffic, the vehicle-pedestrian crashes are more frequently and have become a major concern in road traffic safety though the bumper of a vehicle plays an important role to protect the vehicle body damage in lower speed impacts, many bumpers particularly in large vehicles are too stiff for pedestrian protection and safety to prevent lower extremity injuries in car-pedestrian collisions, it is important to determine the loadings that car front structures impact on the lower extremities and the mechanism by which the injuries are caused the collision mechanism between a GMT bumper and the legform impactor model is investigated numerically using LS-DYNA software. In this paper the work is concerned with an exploration of alternate designs for improving both pedestrian and occupant safety requirements of automotive design. The front end structure should sufficiently stiff to protect the occupant by absorbing the impact energy generated during frontal collision and at the same time it should not include unduly high impact loads during the pedestrian collision these two requirements conflict each other and there should exist an optimum design solution that meets both the requirements. Considering the peek deceleration extracted from the New Car Assessment Programme (NCAP) crash pulse and the impact force generated on the pedestrian as constrained parameters, the design of bumper facia and bumper beam is studied and alternate design recommendations were proposed and analyzed using explicit finite element analysis.
 Pages:
35-40
 Keywords:
Wind-Shield Glass, LS-DYNA, Bumper, Crashworthiness, FMVSS.
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