Stress intensity factor for a corner flaw

✍ Scribed by A.F. Liu

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 267 KB
• Volume: 4
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(72)90087-2

✦ Synopsis

A~~ct-Applying

Smith's solution for a semi-circular flaw, an approximate expression is derived for a corner flaw emanating from an edge of a quarter infinite solid. The maximum stress intensity factor on the periphery of the flaw is found to be K = ~420. The same expression can be obtained if an alternative approach, based on Sneedon's solution for a penny shaped crack, is used. Superimpose with Kobayashi's back surface magnification factor and Bowie's circular hole influence factor, the stress intensity factor expression is checked out with available test data. The correlation between the analysis and the test data was within an accuracy of 4 per cent. ANALYZING in service failures of structural or machine components, one frequently finds the case of a shallow flaw emanating from a 90" external corner. In this note, an approximate stress intensity factor for this configuration is developed by two different approaches, and the resulting expression is checked out by test data currently available in the literature.

It is known that the stress intensity expression for some point on the periphery of a semi-elliptical partthrough flaw emanating from one surface of a plate, is