FIFTH PROGRESS REPORT OF THE ROLLING-LOAD TESTS OF JOINT BARS

This is a report on the tests of joint bar failures and it gives consideration to the revision of design and specifications Observations of tests are: Joint bars for 131-lb RE rail subjected to a wheel load increased in proportion to the increased section modulus of the bars, thus giving equivalent bending stress, render approximately the same joint bar life as the 112-lb bars. The cyclic life of the 131-K14 36-in. bars tested was somewhat longer than that of 24-in. bars of the same type. Top surface bearing at the rail end is wider on TR bars with the 11/16-in. fillet radius than on 112-lb headfree bars with 3/8-in. fillet radius. The average cyclic life of TR bars greater than that found with 112-B34 bars. Rolling-load tests on one lot of 112-B34 bars show an increase of cyclic life resulting from shot-peening. Variations in hardness from bar to bar of the same heat may result from variations in quenching temperature. Surface decarburization usually found on joint bars is readily detected in the Rockwell Test.

• Corporate Authors:

  American Railway Engineering Association

  59 East Van Buren Street
  Chicago, IL  United States  60605
• Authors:
  • Alleman, N J
• Publication Date: 1947

Media Info

• Pagination: p. 714-729
• Serial:
  • AREA BULLETIN
  • Volume: 48
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Bending; Bending stress; Dynamic loads; Fastenings; Fatigue (Physiological condition); Hardness; Metal heating; Rail joints; Stresses; Technology; Tie bars; Wheel loads
• Uncontrolled Terms: Heat treatment
• Geographic Terms: United States
• Subject Areas: Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00033303
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM