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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
1
ISBN electronic:
978-1-62708-214-3
Publication date:
1992
Book Chapter

Examination of Broken Lamp Filaments Following a Rear-End Vehicular Collision

By
Alan A. Johnson
Alan A. Johnson
Professor of Materials Science, University of Louisville
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;
Chauncey A. Lattimer
Chauncey A. Lattimer
Accident-Reconstruction Consultants Inc.
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Published:
1992
Page range:
79 - 82

Abstract

A 1984 Chevrolet Blazer was being pushed by three youths after it ran out of gas when it was hit from behind by a 1979 Mercury Cougar. One of the youths was crushed between the two vehicles and killed. Optical microscopy was used to examine the tungsten filaments from the headlamps of the Cougar and from the four signal/emergency/parking lights of the Blazer to determine whether the vehicles lights were in use at the time of the accident. Based on degree of distension and brittle fragmentation, it was determined that the low-beam headlights of the Cougar and the parking lights of the Blazer were on at the time of the collision.

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Alan A. Johnson, Chauncey A. Lattimer, 1992. "Examination of Broken Lamp Filaments Following a Rear-End Vehicular Collision", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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