Notch geometry effects in fatigue: A conservative design approach

✍ Scribed by David Taylor; Manus O'Donnell

• Book ID: 103996528
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 829 KB
• Volume: 1
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/1350-6307(94)90003-5

✦ Synopsis

The understanding of stress concentrators (notches) is an important element in the prevention of failure in components and in the analysis of failures when they occur. This paper examines critically the methods currently used to predict the fatigue strength of components containing notches, with particular attention to the need for a conservative design approach. Current methods, if correctly applied, are shown to give conservative predictions of fatigue limit and high-cycle fatigue strength, and it is shown that the same philosophy can be extended to cover very small notches, including surface roughness. The presentation of these predictions in the form of a "mechanism map" for notch fatigue is advocated as a useful tool for designers. The problems of extending the approach to other types of stress concentrator, such as fillet radii, are discussed.