This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Post-Impact Dynamics for Vehicles with a High Yaw Velocity
Technical Paper
2016-01-1470
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Calculating the speed of a yawing and braked vehicle often requires an estimate of the vehicle deceleration. During a steering induced yaw, the rotational velocity of the vehicle will typically be small enough that it will not make up a significant portion of the vehicle’s energy. However, when a yaw is impact induced and the resulting yaw velocity is high, the rotational component of the vehicle’s kinetic energy can be significant relative to the translational component. In such cases, the rotational velocity can have a meaningful effect on the deceleration, since there is additional energy that needs dissipated and since the vehicle tires can travel a substantially different distance than the vehicle center of gravity. In addition to the effects of rotational energy on the deceleration, high yaw velocities can also cause steering angles to develop at the front tires. This too can affect the deceleration since it will influence the slip angles at the front tires. This paper explores the influence of high rotational energies and impact induced steering on the deceleration experienced by a vehicle following an impact.
Recommended Content
Authors
Topic
Citation
Rose, N., Carter, N., and Beauchamp, G., "Post-Impact Dynamics for Vehicles with a High Yaw Velocity," SAE Technical Paper 2016-01-1470, 2016, https://doi.org/10.4271/2016-01-1470.Also In
References
- Allen , R. , Klyde , D. , Rosenthal , T. , and Smith , D. Estimation of Passenger Vehicle Inertial Properties and Their Effect on Stability and Handling SAE Technical Paper 2003-01-0966 2003 10.4271/2003-01-0966
- Bailey , M. , Lawrence , J. , Fowler , S. , Williamson , P. et al. Data from Five Staged Car to Car Collisions and Comparison with Simulations SAE Technical Paper 2000-01-0849 2000 10.4271/2000-01-0849
- Bakker , E. , Nyborg , L. , and Pacejka , H. Tyre Modelling for Use in Vehicle Dynamics Studies SAE Technical Paper 870421 1987 10.4271/870421
- Beauchamp , G. , Hessel , D. , Rose , N. , Fenton , S. et al. Determining Vehicle Steering and Braking from Yaw Mark Striations, SAE Int. J. Passeng. Cars - Mech. Syst. 2 1 291 307 2009 10.4271/2009-01-0092
- Brach , R. and Brach , R. Modeling Combined Braking and Steering Tire Forces SAE Technical Paper 2000-01-0357 2000 10.4271/2000-01-0357
- Brach , R. and Brach , M. Vehicle Accident Analysis and Reconstruction Methods, Second Edition Warrendale SAE International 2011 10.4271/R-397
- Brach , Raymond M. , Brach R. Matthew Tire Models used in Accident Reconstruction Vehicle Motion Simulation XVII Europäischen für Unfallforschung und Unfallanalyse (EVU) - Conference Nice, France 2008
- Brach , R. and Brach , R. Tire Models for Vehicle Dynamic Simulation and Accident Reconstruction SAE Technical Paper 2009-01-0102 2009 10.4271/2009-01-0102
- Carter , N. , Beauchamp , G. , and Rose , N. Comparison of Calculated Speeds for a Yawing and Braking Vehicle to Full-Scale Vehicle Tests SAE Technical Paper 2012-01-0620 2012 10.4271/2012-01-0620
- Cliff , W. and Montgomery , D. Validation of PC-Crash - A Momentum-Based Accident Reconstruction Program SAE Technical Paper 960885 1996 10.4271/960885
- Cliff , W. and Moser , A. Reconstruction of Twenty Staged Collisions with PC-Crash's Optimizer SAE Technical Paper 2001-01-0507 2001 10.4271/2001-01-0507
- Cliff , W. , Lawrence , J. , Heinrichs , B. , and Fricker , T. Yaw Testing of an Instrumented Vehicle with and without Braking SAE Technical Paper 2004-01-1187 2004 10.4271/2004-01-1187
- Daily , John , Shigemura , Nathan , Daily , Jeremy Fundamentals of Traffic Crash Reconstruction Institute of Police Technology and Management 2006
- Erickson , Mark S. , Hayes , Wilson C. Drag Factor Attenuation for Rotating Vehicles Accident Reconstruction Journal May June 2008
- Fricke , Lynn B. Traffic Crash Reconstruction Second Northwestern University Center for Public Safety 2010
- Martinez , J. and Schlueter , R. A Primer on the Reconstruction and Presentation of Rollover Accidents SAE Technical Paper 960647 1996 10.4271/960647
- Steffan , H. and Moser , A. The Collision and Trajectory Models of PC-CRASH SAE Technical Paper 960886 1996 10.4271/960886