This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Application of Force Balance Method in Accident Reconstruction
Technical Paper
2005-01-1188
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In the field of accident reconstruction, there has been a significant amount of effort devoted to the calculation and derivation of vehicle crush energy and vehicle stiffness. Crush energy is usually calculated with a crush profile and crush stiffness. But, oftentimes, crush profiles and/or crush stiffnesses are not available and accident constructionists face the situation of insufficient information. In some such cases, the force balance method can be used to reduce the uncertainty. The method follows from Newton's Third Law, i.e., the impact force exerted on one vehicle is balanced by the force exerted on the other vehicle. With the help of this method, crush profile or crush stiffness can be derived.
As a result, the crush energy can then be calculated with improved accuracy. This ultimately increases the accuracy of the overall accident reconstruction. In this paper, examples will be given to illustrate the use of such a methodology.
Recommended Content
Authors
Topic
Citation
Fred Chen, H., Brian Tanner, C., Cheng, P., and Guenther, D., "Application of Force Balance Method in Accident Reconstruction," SAE Technical Paper 2005-01-1188, 2005, https://doi.org/10.4271/2005-01-1188.Also In
SAE 2005 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V114-6; Published: 2006-02-01
Number: V114-6; Published: 2006-02-01
References
- Long, T.J. “A Validation Study for the Force Balance Method in Determination of Stiffness Coefficients,” SAE Paper No. 1999-01-0079
- Grime, W. D. et al “Developing a Crush Profile Estimate by Balancing Impact Forces,” SAE Paper No. 970942
- Brach, R.M. “An Impact Moment Coefficient for Vehicle Collision Analysis,” SAE Paper No. 770014
- Neptune, J.A. Flynn J.E. “A Method for Determining Crush Stiffness Coefficients from Offset Frontal and Side Crash Tests,” SAE Paper No. 980024
- Neptune, J.A. “Crush Stiffness Coefficients, Restitution Constants, and a Revision of CRASH3 and SMAC,” SAE Paper No. 980029
- Strother, C.E. et al “Estimating Vehicle Deformation Energy for Vehicles Struck in the Side,” SAE Paper No. 980215
- Neptune, J.A. “Overview of an HVE Vehicle Database,” SAE Paper No. 960896
- Neptune, J.A. Flynn J.E. “A Method for Determining Accident Specific Crush Stiffness Coefficients,” SAE Paper No. 940913
- Varat, M.S. et al “An Analysis of Trends of Vehicle Frontal Impact Stiffness,” SAE Paper No. 940914
- Hull, W.C. Newton, B.E. “Estimating Crush Stiffness When Reconstructing Vehicle Accidents,” SAE Paper No. 930898
- Neptune, J.A. et al “A Method for Quantifying Vehicle Crush Stiffness Coefficients,” SAE Paper No. 920607
- Nystrom, G.A. et al “Stiffness Parameters for Vehicle Collision Analysis,” SAE Paper No. 910119
- Woolley, R.L. et al “Rear Stiffness Coefficients Derived from Barrier Test Data,” SAE Paper No. 910120
- Strother, C.E. et al “A Comparison between NHTSA Crash Test Data and CRASH3 Frontal Stiffness Coefficients,” SAE Paper No. 900101
- Navin, F. et al “CRASH III and Canadian Test Data,” SAE Paper No. 870499
- Strother, C.E. et al “Crush Energy in Accident Reconstruction,” SAE Paper No. 860371
- Bartlett, W et al “Evaluating the Uncertainty in Various Measurement Tasks Common to Accident Reconstruction,” SAE Paper No. 2002-01-0546
- CFR 49, Part 571, Section 214
- NHTSA Crash Test No. 1262
- Croteau, J.J. et al “Determining Closing Speed in Rear Impact Collisions With Offset and Override,” SAE Paper No. 2001-01-1170
- Tanner, C.B et al “Vehicle and Occupant Response in Heavy-Truck-to-Car Low-Speed Rear Impacts,” SAE Paper No. 970124
- NHTSA Crash Test No. 4429
- NHTSA Crash Test No. 472