Four lectures on fatigue crack growth: III. Fatigue crack propagation, prediction and correlation

✍ Scribed by J. Schivje

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 797 KB
• Volume: 11
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(79)90041-9

✦ Synopsis

Ab&act-Two prediction techniques are introduced, (1) cycle-by-cycle prediction and (2) prediction by correlation. Attention is paid to the problem of describing varhbk-amplitude loading in terms of load cycles. Aspects of fatigtue damage am reviewed with reference to in&action effects and weakoesses in cycle-by-cycle prediction methods. The discussion on prediction by cormhtion is restricted to constantamplitude loading. The validity of the similarity concept based on K-factors is reconsidered. Application of simple specimen data to complex structures is shown. Finally a variety of crack growth equations is reviewul, includiqt aspects of curve tlttiag, a comparison between formulas of Walker and Elber and asymptotic values in the da/dn -AK relation.