A cumulative-fatigue-damage procedure that considers notch effects, mean-stress relaxation, and cyclic hardening and softening is being used at TEREX to evaluate structural reliability. Necessary inputs for the evaluation are: (1) a load-time history of the response of the material to its operating environment, (2) a listing of material characteristics with regard to both manotonic and cyclic properties, (3) an experimental sample with similar section which can be failed under constant-amplitude loading so that a fatigue-concentration factor can be developed, and (4) the appropriate computer "soft ware" needed to simulate the material during its loading environment so that a life prediction can be made. The actual procedure consists of: (1) instrumenting that particular section of interest on the vehicle or component with the appropriate strain gages and wiring, (2) recording the changes in strain on an FM magnetic-tape recorder, (3) digitizing the analog signal on the magnetic tape so that the data can be readily processed by the computer, and (4) inputting the data points, in sequence, to the computer soft ware so that the load history can be combined with other necessary information which allows the computerized model to calculate life prediction, damage estimations and severe stress-strain conditions.

  • Availability:
  • Corporate Authors:

    Society for Experimental Stress Analysis

    21 Bridge Square
    Westport, CT  United States  06880
  • Authors:
    • Michetti, A R
  • Publication Date: 1977-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 69-76
  • Serial:
    • Experimental Mechanics
    • Volume: 17
    • Issue Number: 2
    • Publisher: Society for Experimental Mechanics
    • ISSN: 0014-4851

Subject/Index Terms

Filing Info

  • Accession Number: 00149857
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 1977 12:00AM