This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Comparison of Modelled and Actual Car Dynamic Frontal Crush
Annotation ability available
Sector:
Language:
English
Abstract
The results of the comparison of actual dynamic frontal crush behaviour from initial contact to maximum dynamic crush of 8 cars in 45% frontal overlap and 30 degree rigid barrier impacts at 50 and 56 kph respectively with the predicted responses from an overall frontal crush model are presented. The model used is based on the assumptions of the overall front structure deforming in a geometric manner and of the energy absorption properties in the full width barrier impact being the same as the energy absorption characteristics in other frontal crush configurations for identical average crush depths. The model uses a fundamentally different method of calculating average crush depth to that used in CRASH.
The actual and predicted acceleration-displacement responses show very similar acceleration patterns while comparison of predicted and actual energy equivalent speeds shows for the cars examined that the 98% (+/- 1%) confidence limits between actual and predicted energy equivalent speeds are -8.2 kph to + 6.0 kph for energy equivalent speeds up to 56 kph where energy equivalent speed is the square root of twice the specific energy (energy divided by mass).
Recommended Content
Technical Paper | Predicting Driver Emergency Response Onset using Time-to-Impact |
Technical Paper | Developing a Sled Test from Crash Test Data |
Technical Paper | An Analysis of Traumatic Rupture of the Aorta in Side Impact Sled Tests |
Authors
Topic
Citation
Wood, D., "Comparison of Modelled and Actual Car Dynamic Frontal Crush," SAE Technical Paper 980027, 1998, https://doi.org/10.4271/980027.Also In
References
- Wood D. O'Riordain S. Vallet G. “Car Frontal Crush - a New Perspective” International IRCOBI Conference Dublin, Ireland 1996 201 210
- Wood D. Mooney S. “Modelling of Car Dynamic Frontal Crush” SAE Technical Paper 970943 Society of Automotive Engineers, Inc. Warrendale, Pennsylvania, USA 1997
- Wood D. Doody M. Mooney S. “Application of a Generalised Frontal Crush Model of the Car Population to Pole and Narrow Object Impacts” SAE Technical Paper 930894 Society of Automotive Engineers, Inc. Warrendale, Pennsylvania, USA 1993
- O'Riordain S. Vallet G. Wood D. “Modelling of Car Dynamic Crush Behaviour in Frontal Impact” International IRCOBI Conference Lyons, France September 1994
- Wood D. “Determination of Speed from Crush” “Forensic Accident Investigation: Motor Vehicles” Bohan T.L. Damask A.C. Michie Butter-worth Charlottesville, Virginia, USA 1995
- Wood D. Mooney S. Vallet G. “An Estimation Method for the Frontal Impact Response of Cars” International IRCOBI Conference Hannover, Germany 1997 321 336
- Prasad A.K. “Energy Dissipated in Vehicle Crush - a Study Using the Repeated Test Technique” SAE Technical Paper 900412 Society of Automotive Engineers, Inc. Warrendale, Pennsylvania, USA 1990