ANALYSIS OF ROAD SERVICE ENVIRONMENTAL DATA AND LABORATORY FATIGUE TEST DATA FOR DEVELOPMENT OF RECOMMENDED BOLSTER FATIGUE TEST GUIDELINES

The development of acceptable guidelines for a truck bolster fatigue test specification requires information concerning the operating service environmental loads that this truck component will be subjected to over its lifetime. A broad range of operational data with varying speeds and track conditions are required to determine the sizes and positions of the loads, as well as the cyclic frequency. Several road service test series were run previously in relatively slow, heavy coal consists. These runs were documented and analyzed in previous publications, References 1 and 2. A generally higher speed test series using the same 100 ton coal hopper as before is described and the truck load data reduced and analyzed. Analysis of the complete set of all service conditions was used to develop a laboratory test machine simulation of the actual road conditions. Laboratory bolster fatigue tests were used to develop recommended load magnitudes and cycle requirements. Additional lab tests were used to upgrade and validate the guidelines proposed for a truck bolster fatigue test which is to be an addition to an official AAR test specification. Procedures used to develop the guidelines, including the mathematical analysis, are presented. The final version of the recommended guidelines is also presented.

  • Corporate Authors:

    Association of American Railroads Research Center

    3140 South Federal Street
    Chicago, IL  USA  60616

    Railway Progress Institute

    801 North Fairfax Street
    Alexandria, VA  USA  22314
  • Authors:
    • EVANS, R A
    • Johnson, M R
  • Publication Date: 1980-8

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 66 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00334477
  • Record Type: Publication
  • Report/Paper Numbers: AAR R-440 Final Rpt.
  • Files: TRIS
  • Created Date: Jun 12 1981 12:00AM