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Safety Performance Comparison of 30 MIL HPR Laminated and Monolithic Differentially Tempered Windshields
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Abstract
Conventional 30 mil HPR laminated and wide-zone monolithic tempered windshields are compared on a safety performance basis from the stand-points of occupant injuries from frontal force collisions and injury or loss of control from breakage from high speed external impact of stones. All experiments were conducted with the windshields installed by conventional methods in an automobile.
Occupant injury potential as measured by the Severity Index for brain damage at a 30 mph barrier impact simulation was approximately two times as high for the tempered as for the laminated windshields, although only one tempered windshield exceeded the recommended maximum value of 1,000. Severe lacerations resulted in all impacts in which the tempered glass broke. Less severe lacerations were found for the laminated windshield impacts at comparable speeds.
External stone impacts to the laminated windshields at speeds up to 75 mph resulted in only localized damage and had essentially no affect on the driver while each case of fracture of the tempered windshield resulted in 15 to 20 pounds of glass particles entering the vehicle and causing considerable driver distraction.
On the basis of the experimental results of this program, the authors conclude that the safety characteristics of laminated windshields are superior to those of the tempered windshields.
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Patrick, L., Trosien, K., and DuPont, F., "Safety Performance Comparison of 30 MIL HPR Laminated and Monolithic Differentially Tempered Windshields," SAE Technical Paper 700427, 1970, https://doi.org/10.4271/700427.Also In
References
- Gadd C.W. “Use of a Weighted-Impulse Criterion for Estimating Injury Hazard” Proceedings, Tenth Stapp Car Crash Conference Holloman AFB, N. M. November 1967 Paper No. 660793
- Lister R.D. “Safety Glass for Windscreens” Automobile Engineer 51 9 September 1961
- Hobbs J.A. Allsop R.E. Starks H.J.H. “Injuries Produced by Motor-car Windscreens” Road Research Laboratory Crowthorne Berkshire, England 1968
- Hellstrom G. “Windshield Damages” 1963
- Mackay G.M. The University of Birmingham England
- Rodloff G. Breitenburger G. “Bedinguner fur eine Weitgehend Sichere Windschutzscherbe.” ATZ 68 SAE Paper #670191 January 1967
- Holland G. Dr. 1967 Kiel, Germany
- Junghannss K. Dr. July 1967 Stuttgart, Germany
- Meyerratken Med. E. Dr. 85 22 November 1967 Berlin, Germany
- Friedrich H. Dr. 1968 Munich, Germany
- Gogler E. Dr. Surgical University Clinic Heidelberg, Germany Report of the 74th Session of the Traffic Committee Bonn, Bundeshaus, Germany April 1969
- Muller-Jensen K. 5 1969 Munich, Germany
- Patrick L.M. Daniel R.P. “Comparison of Standard and Experimental Windshields” Eighth Stapp Car Crash and Field Demonstration Conference 1966
- Fargo R.B. “Windshield Glazing as an Injury Factor in Automobile Accidents” Cornell Aeronautical Laboratory Inc. October 1968
- Huelke D.F. Grabb W.C. Dingman R.O. Oneal R.M. “The New Automobile Windshield and Its Effectiveness in Reducing Facial Lacerations” Plastic and Reconstructive Surgery 41 6 1968
- Haynes A.L. Lissner H.R. “Experimental Head Impact Studies” Fifth Stapp Car Crash and Field Demonstration Conference 1961 158 170
- British Standards Institution “Safety Glass for Land Transport” British Standard 857 1967
- Patrick L.M. Van Kirk D.J. Nyquist G.W. “Vehicle Accelerator Crash Simulator” Proceedings, Twelfth Stapp Conference Detroit, Michigan October 1968 Paper No. 680791
- Patrick L.M. Trosien K.R. DuPont F.T. “Safety Performance of a Chemically Strengthened Windshield” SAE Paper No. 690485 May 1969