LOWER LACERATION DANGER FROM CHEMICALLY STRENGTHENED WINDSHIELD
A NEW SAFETY WINDSHIELD RECENTLY DEVELOPED SEEMS TO HAVE ACHIEVED ITS INTENDED PURPOSE OF REDUCING THE INJURY POTENTIAL OF THIS SOURCE OF DANGER. CRASH SIMULATION TEST RESULTS ATTEST TO THE NEW DESIGN'S EFFECTIVENESS IN PREVENTING LACERATION AND IN LIMITING CONCUSSION FORCES TO ACCEPTABLE LEVELS. THIS WINDSHIELD, WHICH IS EXPECTED TO APPEAR ON SOME 1970 DOMESTIC PASSENGER CARS, DIFFERS FROM THOSE IN CURRENT USE MAINLY IN ITS EMPLOYMENT OF A CHEMICALLY STRENGTHENED INNER LAYER. THIS LAYER IS ONLY 0.070 IN. THICK...SLIGHTLY MORE THAN HALF AS THICK AS THE INNER LAYER OF A CONVENTIONAL WINDSHIELD...BUT CAN WITHSTAND A SUDDEN SHORT-TIME BENDING STRESS OF ABOUT 40,000 PSI, AN AMOUNT PRODUCED BY BENDING TO A RADIUS OF 10 IN. IN A MILD IMPACT WITH A CAR OCCUPANT'S HEAD THE WINDSHIELD WILL FLEX AND THE THICKER, UNSTRENGTHENED OUTER LAYER WILL BREAK, BUT THE INNER LAYER WILL REMAIN INTACT. /AUTHOR/
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Supplemental Notes:
- Vol 77, No 10, PP 70-71
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Authors:
- Blizard, J R
- Publication Date: 1969-10
Media Info
- Serial:
Subject/Index Terms
- TRT Terms: Bending; Bending stress; Excavations; Head; Safety glass; Shock (Pathology); Stresses; Traffic crashes; Vehicle safety; Windshields
- Uncontrolled Terms: Motor vehicle accidents
- Old TRIS Terms: Concussion; Vehicular safety
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00223066
- Record Type: Publication
- Files: TRIS
- Created Date: Feb 16 1970 12:00AM