Fractography of an Axle Which Broke Under Combined Bending Impact and Torsion

[+] Author and Article Information
Alan A. Johnson

Speed Scientific School, University of Louisville, Louisville, KY 40292

J. Eng. Mater. Technol 116(1), 130-131 (Jan 01, 1994) (2 pages) doi:10.1115/1.2904248 History: Received July 27, 1990; Revised December 28, 1992; Online April 29, 2008


An automobile rear axle broke at the differential end when the vehicle collided with a tree at about 35 m.p.h. The fracture surfaces exhibited features characteristic of both bending impact and torsional overload. It was concluded that the fracture started as a bending impact when the frontal collision forced the entire drive system rearward. The fracture was completed by torsional overload when the drive system locked and the wheel continued to turn.

Copyright © 1994 by The American Society of Mechanical Engineers
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