This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Modelling of Car Dynamic Frontal Crush
Annotation ability available
Sector:
Language:
English
Abstract
This paper examines the dynamic displacement-crushing force and dynamic displacement-absorbed energy behaviour of eight cars in full width barrier, 45% overlap rigid barrier and 30° angled barrier tests at 56, 50 and 56 kph respectively. This study shows the frontal crush behaviour of these cars can be divided into three regions or zones of constant force, these zones being associated with crushing of the front structure as far as the engine, the engine and rear front structure and the occupant compartment. The highest average crushing force is associated with crushing of the engine and rear front structure with lower average crushing forces required for the extreme front of the car and for the occupant compartment.
It is hypothesised that the energy absorbed-dynamic displacement behaviour in the full width barrier test represents the energy absorbed-mean displacement for all other crush configurations. This hypothesis is combined with the geometric crushing model for the car front (Wood 1993, 1995) to calculate the responses in the 45% overlap and the 30° angled barrier tests for one of the cars. A high degree of correlation is obtained. Further evaluation is needed to verify the hypothesis.
Recommended Content
Topic
Citation
Wood, D. and Mooney, S., "Modelling of Car Dynamic Frontal Crush," SAE Technical Paper 970943, 1997, https://doi.org/10.4271/970943.Also In
References
- Hight P. Lent-Koop B. Hight R. “Barrier Equivalent Velocity, Delta V and Crash 3 Stiffness in Automobile Collisions” SAE Technical Paper 850437 1985
- Johnson W. Mamalis A.G. “Crashworthiness of Vehicles” Mech. Eng. Publ. London 1978
- Jones N. Birch R.S. “Dynamic and Static Axial Crushing of Axially Stiffened Tubes” J. of Mech. Eng. Sc. 204 C5 204 210 1990
- Wood D.P. “A model for the Frontal Impact Characteristics of the Car Population” Proc. of the 4th International Conference on Structural Failure, Product Liability and Technical Insurance 396 406 Vienna, Austria July 1992
- Wood D.P. Mooney S.J. Doody M. “Application of a Generalised Frontal Crush Model of the Car Population to Pole and Narrow Object Impacts” SAE Technical Paper 930834 1993
- Wood D.P. “Determination of Speed from Crush” Forensic Accident Investigation: Motor Vehicles Bohan T.L. Damask A.C. Publ. Michie Butterworth 1995
- Wood D.P. O'Riordain S. Vallet G. “Car Frontal Crush - A New Perspective” 1996 International IRCOBI Conference on The Biomechanics of Impact 201 210 1996