The propagation conditions of the following defects were studied: transverse cracks in the head; horizontal cracks in the head; and starcracking at fish-bolt holes. The main object was to attempt to determine the length of time after the appearance of detection of the failures during which the rails could be left in the track before dangerous failure became imminent. Laboratory tests failed to determine this time factor. Field test results from the Paris suburban railway are briefly described for the three types of defects. Laboratory measurement of transverse defects showed the electric method gave more accurate results than the ultrasonic method using pulse echoes.

  • Supplemental Notes:
    • Question D88
  • Corporate Authors:

    International Union of Railways

    Office of Research and Experiments
    Utrecht,   Netherlands 
  • Publication Date: 1967-7

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00040122
  • Record Type: Publication
  • Report/Paper Numbers: ORE PU-25 Rpt
  • Files: TRIS
  • Created Date: Jan 22 1976 12:00AM