Fatigue crack growth under biaxial loading

✍ Scribed by Keiji Ogura; Kiyotsugu Ohji; Yoshiji Ohkubo

• Publisher: Springer Netherlands
• Year: 1974
• Tongue: English
• Weight: 110 KB
• Volume: 10
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00155268

✦ Synopsis

It has been found that the mode I fatigue crack growth rate is affected by the transverse stress o 2 (see Fig. i), although only a limited amount of experimental results are available in the literature [1,2]. However, an attempt to interpret this kind of behavior in crack growth rate under biaxial loading in terms of the stress intensity factor has never been successful, since the stress intensity factor K I is not affected by o 2 [3].

The effective stress intensity factor renge AK .~, which is based e ~ on t h e o p e n i n g and C l o s i n g b e h a v i o r o f t h e p r o p a g a t l n g f a t l g u e c r a c k , may explain this problem successfully as well as the crack growth problem under variable amplitude loading [4]. From this point the authors tried to analyse the opening and closing behavior of the propagating fatigue crack under biaxial stress conditions.