Publication Date:
2019-06-27
Description:
The 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.
Keywords:
STRUCTURAL MECHANICS
Type:
NASA-TM-X-64863
Format:
application/pdf
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