FATIGUE-CRACK PROPAGATION IN METALS

Cyclic-tension tests between constant limits of stress-intensity factor and at constant speed have been conducted on aluminum alloy RR 58 and mild steel BS 15. The resulting crack propagation was monitored against the number of cycles. The results, together with those obtained by other workers on similar metals, have been examined in the light of linear elastic fracture-mechanics concepts and two simple crack-propagation laws assessed. A typical linear relationship between crack length and number of cycles was observed, the relationship between crack growth and stress intensity was found to exhibit three separate regions and a law based on mean levels of the stress intensity found to adequately describe the results. There was evidence of a threshold value of stress intensity below which fatigue cracks may not grow. /Author/

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  • Corporate Authors:

    Society for Experimental Stress Analysis

    21 Bridge Square
    Westport, CT  USA  06880
  • Authors:
    • Radon, J C
    • Culver, L E
  • Publication Date: 1976-3

Media Info

  • Features: Figures; References;
  • Pagination: p. 105-110
  • Serial:
    • Experimental Mechanics
    • Volume: 16
    • Issue Number: 3
    • Publisher: Society for Experimental Mechanics
    • ISSN: 0014-4851

Subject/Index Terms

Filing Info

  • Accession Number: 00131199
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM