EFFECT OF MEAN STRESS INTENSITY ON FATIGUE CRACK GROWTH IN A 5456-H117 ALUMINUM ALLOY

Fatigue crack growth data on a 5456-H117 aluminum alloy was obtained by testing compact tension and contoured double cantilever beam specimens. The effect of tensile mean stress on crack growth rate is found to reach a maximum when stress ratio R greater than or equal to 0.25. The crack propagation laws are discussed, and two new equations are developed. It is shown that the new equations can represent the entire range of fatigue crack growth rate, versus applied stress intensity for different R values from threshold behavior to unstable fracture. (Modified author abstract)

  • Availability:
  • Corporate Authors:

    Naval Ship Research and Development Center

    Washington, DC  USA 
  • Authors:
    • Chu, H P
  • Publication Date: 1973-6

Media Info

  • Pagination: 43 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00048091
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • ISBN: NSRDC-28-663
  • Report/Paper Numbers: NSRDC-3933 R&D Rpt
  • Files: TRIS
  • Created Date: Nov 14 1973 12:00AM