A MECHANICAL MODEL FOR FATIGUE CRACK PROPAGATION

A MECHANICAL MODEL OF FATIGUE CRACK PROPAGATION IS PROPOSED. IT HYPOTHESIZES THAT DAMAGE DUE TO STRAIN CYCLING OF THE MATERIAL AT A CRACK TIP CAUSES PROPAGATION. MASON-COFFIN'S STRAIN CYCLE FATIGUE LAW WAS USED AS FAILURE CRITERION AND MINER'S LAW WAS USED FOR DAMAGE ACCUMULATION. THE PROPOSED THEORY CORRELATES SURPRISINGLY WELL WITH DATA FOR 2024-T351 A1 AND 4340 FULLY ANNEALED STEEL. STRAINS AT A CRACK TIP WERE MEASURED BY THE MOIRE OPTICAL INTERFERENCE METHOD. THE STRAIN AT A CRACK TIP WAS PROPORTIONAL TO DELTA K SQUARE. THE RESULTS OF STRAIN MEASUREMENTS WERE USED TO CALCULATE CRACK PROPAGATION RATE. /AUTHOR/

  • Supplemental Notes:
    • PAPER 71
  • Corporate Authors:

    CHAPMAN AND HALL

    LONDON,    
  • Authors:
    • Liu, H W
    • Iino, N
  • Publication Date: 1969-4

Media Info

  • Features: Figures; References;
  • Pagination: p. 812-23

Subject/Index Terms

Filing Info

  • Accession Number: 00209930
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 23 1974 12:00AM