This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Part 581, IIHS Damageability and Lower Leg Impact Compliant Bumper - Challenges and Solutions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2012 by SAE International in United States
Annotation ability available
The worldwide involvement in global technical regulation (GTR) discussion shows the increasing importance of pedestrian safety as a global concern. In the US, bumper systems are designed for the Part 581 bumper standard and IIHS (Insurance Institute of Highway Safety) bumper structural test protocols. There has also been discussion in the North American automotive industry about the merits of incorporating some measure of pedestrian protection into their systems as well. Compliance with the potential pedestrian leg requirements creates a design conflict with current bumper damageability standards and possibly CAFÉ laws. The difficulties of designing a bumper system that is rigid enough to protect the vehicle in low speed crashes and, at the same time, compliant enough to protect a pedestrian raise questions as to whether these ideas are compatible.
This paper presents reasonable means by which to manage lower leg impact, Part 581 bumper standards and IIHS bumper damageability assessment criteria in a styling and cost structure way, which is typical of today's automotive industry. The proposed approach is validated over a generic vehicle platform through extensive computer-aided engineering (CAE) and subsystem level testing.
CitationNagwanshi, D., Marks, M., and Bobba, S., "Part 581, IIHS Damageability and Lower Leg Impact Compliant Bumper - Challenges and Solutions," SAE Technical Paper 2012-01-0274, 2012, https://doi.org/10.4271/2012-01-0274.
- “Directive 2003/102/EC of the European Parliament and of the Council of 17 November 2003 relating to the protection of pedestrians and other vulnerable road users before and in the event of a collision with a motor vehicle and amending Council Directive 70/156/EEC” http://europa.eu.int/eurlex/pri/en/oj/dat/2003/l_321/l_3210031206en00150025.pdf 2003
- Nolan, J. Brumbelow, M. Zuby, D. Avery, M. “Important Considerations in the Development of a Test to Promote Stable Bumper Engagement in Low-Speed Crashes,” SAE Technical Paper 2004-01-1319 2004 10.4271/2004-01-1319
- IIHS Low Speed Crash Test procedure May 2006
- Jaarda, E. Mahfet, M. Nagwanshi, D. Sreeram, T. et al. “A Global Energy Absorber Concept for Combined Pedestrian and IIHS Regulations,” SAE Technical Paper 2006-01-1658 2006 10.4271/2006-01-1658
- LsDyna keyword user's manual April 2003