Fatigue Behavior of Shot Peened Notched Specimens: Effect of the Residual Stress Field Ahead of the Notch Root. (2015)

• Record Type: Journal Article
• Authors: Benedetti, M.; Fontanari, V.; Winiarski, B.; Withers, P.J.; Allahkarami, M.; Hanan, J.C.
• Is Part Of: Procedia engineering. Volume 109(2015)
• Page Start: 80
• Page End: 88
• Publication Date: 2015
• Subjects: Shot peening -- notch fatigue -- Al-7075-T651 -- residual stresses -- critical distance theory; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.06.210
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Shot peening strongly increases the notch fatigue strength of metallic components. This benefit is mainly attributed to compressive residual stresses. In this paper, we address this topic by performing bending fatigue tests on Al-7075-T651 samples carrying notches with different severity. Fatigue lives between 10 5 and 10 8 cycles have been explored. The residual stress field ahead of the notch has been characterized by experimental measurements and numerical reconstruction and incorporated into the Crossland fatigue criterion combined with critical distance theory method to predict the fatigue resistance.