SUMMARY OF PROGRESS OF INVESTIGATION OF STRESS RELAXATION IN RAIL STEEL

Relaxation of stresses in small bar specimens is being studied as a function of time and temperature, and rolling-load fatigue tests are being run on small specimens. These specimens were cut from a 152-lb rail rolled in 1939. The rail had shelly spots throughout its length. Measurements are made before bending after bending and before heating and after heating and removal from the jig. A summary of test results is shown in a plot of percent stress relaxation versus time at temperature. For temperatures lower than 900 deg F., the amount of relation is quite small. After an initial period, the amount of relaxation at a given temperature increases only slightly as time at temperature increases.

• Corporate Authors:

  American Railway Engineering Association

  59 East Van Buren Street
  Chicago, IL  United States  60605
• Authors:
  • Jenkins, D R
  • Grover, H J
• Publication Date: 1952-2

Media Info

• Features: Figures; Photos;
• Pagination: p. 916-920
• Serial:
  • AREA BULLETIN
  • Volume: 53
  • Issue Number: 500
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Bending; Bending stress; Defects; Dynamic loads; Fatigue (Mechanics); Fatigue (Physiological condition); Railroad rails; Shelling (Metals); Stresses; Technology; Temperature
• Geographic Terms: United States
• Old TRIS Terms: Shelling; Shelling (Rails)
• Subject Areas: Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00040817
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM