Energy variation trends in the fatigue growth of surface cracks under tension and bending

✍ Scribed by D Gera; M.A Mahmoud

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 703 KB
• Volume: 41
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(92)90298-s

✦ Synopsis

Abstr&-There is a dramatic change in the shape of the semi-elIiptiad surface cracks, growing due to combined cyclic bending and tensile loading of plam. It is possibk to predict the change of aspect ratio (o/c) during the propagation of the crack. The growing cracks change their shapes such that they follow pmf& propagation patterns (PPPs). Some of the important characteristics during crack propagation are determined. In particular, strain euergy release rata (G) variation during crack growth is presented and discus&. It is shown that the shape of any growing crack changes such that G for the crack tries to converge to the prefezmd propagation trend. Also, some of the geometrical variations during the propagation of the cracks are discussed.