This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Improving Side Crash Performance of a Compact Car via CAE
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 01, 2014 by SAE International in United States
Annotation ability available
The side impact accident is one of the very severe crash modes for the struck side occupants. According to NHTSA fatality reports, side impact accounts for over 25% of the fatalities in the US. Similar fatality estimates have been reported in the EU region. Side crash compliance of a compact car is more severe because of the less space available between the occupant and the vehicle structure, stringent fuel economy, weight and cost targets.
The current work focuses on the development of Side body structure of a compact car through Computer Aided Tools (CAE), for meeting the Side crash requirements as per ECE R95 Regulation. A modified design philosophy has been adopted for controlling the intrusion of upper and lower portion of B-pillar in order to mitigate the injury to Euro SIDII dummy. At first, initial CAE evaluation of baseline vehicle was conducted. Further design iterations were carried out to optimize the stiffness of B-pillar for meeting the performance targets of B-pillar intrusion and velocity. The developed countermeasure package enabled in reducing the weight of side body structure of vehicle by 25% while satisfying the performance targets.
Finally all the countermeasures were implemented in the Prototype vehicle and physical crash test was conducted for the final verification. Test and CAE results showed very good correlation in terms of overall vehicle deformation as well as B-pillar intrusion and velocity profile. Significant improvement in the Side crash performance of the vehicle was achieved with the newly adopted design philosophy.
CitationKumar, S. and Deb, P., "Improving Side Crash Performance of a Compact Car via CAE," SAE Technical Paper 2014-01-0546, 2014, https://doi.org/10.4271/2014-01-0546.
- Strother , C. , Kent , R. , and Warner , C. Estimating Vehicle Deformation Energy for Vehicles Struck in the Side SAE Technical Paper 980215 1998 10.4271/980215
- Cesari D and Bloch J 1984 The influence of car structures behavior on occupant protection in car to car side impact Vehicle Structures, International Conference on Vehicle Structures, C 163/84 7 10 Mechanical Engineering Publications Ltd. London, England
- Dazhi Wang , Gaung Dong , Jinhuan Zhang et al. Car crashworthiness in pole side impact and MDB side impact The 4 th International Forum of Automotive Traffic Safety Changsha, China 2005
- Mouli , P. Design of the Occupant Protection System for Critical Side Impact requirements SAE Technical Paper 2009-28-0055 2009 10.4271/2009-28-0055
- Livermore Software Technology Corporation LS-DYNA Version 971 Keyword User's Manual 2876 Waverley Way, Livermore, California, USA 2003
- Livermore Software Technology Corporation LS-DYNA Theoretical Manual 2876 Waverly Way, Livermore, California, USA 1998
- Nayak , A. , Ekhande , S. , and Marella , M. B-Pillar Intrusion and Velocity Sensitivity Study for Side Impact Load Case SAE Technical Paper 2011-28-0109 2011 10.4271/2011-28-0109