REVIEW OF FATIGUE-CRACK-GROWTH PREDICTION METHODS

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:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00144851
• 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

• TRT Terms: Compression; Diagrams; Fatigue (Mechanics); Forecasting; Fracture mechanics; Loads; Oversize loads; Sequencing; Stress ratio; Tension
• Uncontrolled Terms: Loading; Overloads
• Old TRIS Terms: Fatigue diagrams; Sequences; Tensile load
• Subject Areas: Bridges and other structures; Highways;

Filing Info

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