Fatigue crack growth retardation following load reductions in a plain C-Mn steel

✍ Scribed by S.G. Druce; C.J. Beevers; E.F. Walker

• Book ID: 103068217
• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 915 KB
• Volume: 11
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(79)90013-4

✦ Synopsis

A~T~nsient

fatigue crack growth effects following ~~~t~ns in applied loading conditions have been studied using a low strength plain C-h&n steel. Reductions in both the alternating and maximum components of the fatigue loadii spectrum have been systematically investigated and evaluated using a linear elastic fracture mechanics approach. Results are discussed in terms of the residual stress concept, and a model based on an effective stress intensity concept is propossed to rationalise growth rates within the retardation a&ted zone. Using constant amplitude fatigue threshold and crack growth dam obtained under similar conditions, tire model is shown to be in good agreement with experimental data.