Path independent integrals for computing stress intensity factors at sharp notches in elastic plates

✍ Scribed by G. B. Sinclair; M. Okajima; J. H. Griffin

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 623 KB
• Volume: 20
• Category: Article
• ISSN: 0029-5981
• DOI: 10.1002/nme.1620200603

✦ Synopsis

A set of path independent integrals is constructed for the calculation of the generalized stress intensity factors occurring in elastic plates having sharp re-entrant corners or notches with stress-free faces and subjected to Mode I, I1 or 111 type loading. The Mode I integral is then demonstrated to enjoy a reasonable degree of numerical path independence in a finite element analysis of a test problem having an exact solution. Finally, this integral is used on the same problem in conjunction with a regularizing, finite element, procedure or superposition method. The results indicate that sufficiently accurate estimates of these stress intensity factors for engineering purposes can be achieved with little computational effort.