Empirical relations for describing constant-amplitude crack- growth behavior are reviewed. The effect of stress ratio (mean stress) on crack growth is illustrated through the use of plots analogous to constant- lifetime fatigue diagrams. Experimentally observed load-sequence effects, such as crack retardation due to tensile overloads, acceleration due to compressive overloads, the interaction between tensile and compressive overloads, etc. are summarized. The crack-closure phenomenon is reviewed, since it seems to provide a plausible physical explanation for many sequence effects. Methods of predicting crack growth under variable- amplitude loading (including irregular loadings representative of actual service) are reviewed and some of their limitations noted.

  • Availability:
  • Corporate Authors:

    Society for Experimental Stress Analysis

    21 Bridge Square
    Westport, CT  United States  06880
  • Authors:
    • Nelson, D V
  • Publication Date: 1977-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 41-49
  • Serial:
    • Experimental Mechanics
    • Volume: 17
    • Issue Number: 2
    • Publisher: Society for Experimental Mechanics
    • ISSN: 0014-4851

Subject/Index Terms

Filing Info

  • Accession Number: 00149853
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 1977 12:00AM