A new model for fatigue crack growth after a single overload

✍ Scribed by Lu Yichi; Li Kangxian

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 632 KB
• Volume: 46
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(93)90136-g

✦ Synopsis

Abstnet--several co-existing, mutuaIiy competitive mechanisms are involved in fatigue crack growth after o~lo~ing.

The lowest fatigue crack growth rate, the crack growth increment at which the fatigue crack growth rate reaches its minimum, and the overloading a&xted zone size are the three most important parameters to describe an overload event. A new model for the fatigue crack growth rate based on these three parameters has been proposed to describe the fatigue crack growth behavior after a single overload. By so doing, not only can the well recognized mechanisms like crack closure and compressive residual stresses be considered. but also those mechanisms that have been less discussed before, like crack tip blunting and strain hardening.