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Ultrasonic measurement of stress in railroad wheels and in long lengths of welded railThe failure of high speed emergency braking is discussed for railroad wheels and track. It is shown that high compressive residual stresses exist in the rims of new wheels which generate excessive heat, reducing the stress levels. Thermal stresses that build up in continuous lengths of welded track are reported and nondestructive methods of measuring stresses in thick steel are presented for identification, replacement, or adjustment before hazardous failures occur.
Document ID
19740023246
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Clotfelter, W. N. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Risch, E. R. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
NASA-TM-X-64863
Accession Number
74N31359
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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