This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Novel Energy Absorber Design Technique for an Idealized Force-Deformation performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2008 by SAE International in United States
Annotation ability available
This paper presents a novel approach to design an efficient energy absorber using thermoplastic (PC/PBT - Polycarbonate/ Polybutylene Terephthalate) material. Automotive industry always demands minimum package space between bumper beam and fascia from styling perspective. This requires an efficient energy absorber, which can meet the energy absorption target through an idealized force-intrusion performance.
In the present study, thermoplastic energy absorber with sequential failure is designed through geometrical configuration to achieve the idealized Force-Deformation (FD) curve. CAE techniques are used extensively for optimizing the design parameters of energy absorber to achieve the desired performance level. The results in the form of FD curve are compared with the idealized curve and the efficiency is calculated. Comparative studies are also performed with foam energy absorber solution.
Novel thermoplastic (PC/PBT) energy absorber design achieves high initial stiffness to reach desired force and subsequently maintain the force value. Design shows high-energy absorption efficiencies with the benefit of tuning the stiffness to reach required FD performance through controlled crushing of EA (Energy Absorber). Thus, the necessary packaging space remains minimal through efficient design/material performance.
CitationSofi, F., Kulkarni, S., Haarda, M., and Takaaki, N., "A Novel Energy Absorber Design Technique for an Idealized Force-Deformation performance," SAE Technical Paper 2008-01-0184, 2008, https://doi.org/10.4271/2008-01-0184.
- “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” 2003
- Schuster P Staines B “Determination of Bumper Styling and Engineering Parameters to Reduce Pedestrian Leg Injuries” SAE Paper No. 980361
- Schuster P J “Current trends in bumper design for pedestrian impact” SAE Paper No. 2006-01-0464
- Nanda A Gopi Surisetty K Mohapatra S Shaleena AD Shuler S Mooijman F. “Method for designing and evaluating Pedestrian Protection Energy Absorbers for various car geometries,” SAE Paper No. 2004-01-1702
- LS-DYNA Keyword User's Manual April 2003