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Ford “S” Frame
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1969 by SAE International in United States
Annotation ability available
Since statistics indicate that front impact is the major accident type, Ford has been studying energy-absorbing structures for some time. Early designs such as the “ball and tube” and “rail splitter” were discarded in favor of the “S” frame. Details of the design approach and testing are given in this paper.
Design objectives were increased effective collapse distance, compatibility with production practices, and maintenance of satisfactory noise, vibration, and harshness levels. Safety objectives are improved passenger compartment integrity and reduction of seat belt loads.
Barrier crash tests at 30 mph (equivalent to collision into standing vehicle at 50 mph) were used to evaluate the design of the “S” frame.
Results of testing indicate that occupant restraint with seat belts, combined with front end structural improvements, offer the most promise for injury reduction during service front impact accidents.
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CitationBaracos, N. and Rhodes, A., "Ford “S” Frame," SAE Technical Paper 690004, 1969, https://doi.org/10.4271/690004.
- Egli A., “Stopping the Occupant of a Crashing Vehicle -- A Fundamental Study.” Paper 670038, January 1967.
- Miura N. and Kawamura K., “An Analysis of Deformation Mechanism in Head-On Collisions.” SAE Transactions, Vol. 77 (1968), paper 680484, May 1968.
- Manjoine J. M., “Influence of Rate of Strain and Temperature on Yield Stresses of Mild Steel.” J. Appl. Mech., Vol. II, Trans. ASME, Vol. 66.
- Muller G. H., “Why a Second Collision?” Highway Safety Research Institute, University of Michigan, April 1967.
- McHenry R. R., “Analysis of the Dynamics of Automotive Passenger Restraint Systems.” Cornell Aeronautical Research Laboratory, June 1965.
- Patrick L. M., Mertz H. J., and Kroell C. K., “Impact Dynamics of Unrestrained Lap Belted and Lap and Diagonal Chest Belted Occupants.” SAE Transactions, Vol. 75 (1967), paper 66078.
- Stapp J. P. and Enfield D. L., “Evaluation of the Lap-Type Automobile Safety Belt with Reference to Human Tolerance.” Paper 62A presented at SAE Summer Meeting, June 1958.
- Severy D. M. and Mathewson J. H. “Automobile Barrier and Rear-End Collision Performance.” SAE Transactions, Vol. 66, 1958.
- National Safety Council, “Accident Facts.” 1967 Edition.
- Nahum, Siegel, Trachtenberg, “Causes of Significant Injuries in Non-Fatal Traffic Accidents.” 10th Stapp Car Crash Conference Proceedings, 1966.