Determination of Bumper Styling and Engineering Parameters to Reduce Pedestrian Leg Injuries

Paper #:
  • 980361

Published:
  • 1998-02-23
DOI:
  • 10.4271/980361
Citation:
Schuster, P. and Staines, B., "Determination of Bumper Styling and Engineering Parameters to Reduce Pedestrian Leg Injuries," SAE Technical Paper 980361, 1998, doi:10.4271/980361.
Abstract:

The European Commission is proposing legislation aimed at reducing the severity of injuries sustained by pedestrians in the event of an impact with the front-end of a motor vehicle. One aspect of this proposed legislation is reducing the pedestrian's leg injuries due to contact with the bumper and frontal surfaces of a vehicle, assessed using a ‘pedestrian leg impact device,’ or ‘leg-form.’

This proposed legislation presents the challenge of designing a bumper system which achieves the required performance in the leg-form impact-without sacrificing the bumper's primary function of vehicle protection during low-speed impacts. The first step in meeting this challenge is to understand what effects the front-end geometry and stiffness have on the leg-form impact test results. These results will then need to be compared to low-speed impact performance to assess if the two requirements are compatible.

This paper describes an investigation-using concept Finite Element models and a front-end variable geometry vehicle test buck-of the styling and engineering tradeoffs for a pedestrian safe bumper system.

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