TheT-criterion for ductile fractures in HRR plastic singular fields

✍ Scribed by P. S. Theocaris; T. P. Philippidis

• Book ID: 104616156
• Publisher: Springer Netherlands
• Year: 1987
• Tongue: English
• Weight: 843 KB
• Volume: 35
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00034532

✦ Synopsis

When a material exhibits large amounts of plastic deformation before failure, with a continuous evolution of the elasti~plastic boundaries around the crack tip the assumptions made by all criteria based on linear fracture mechanics (LEFM) are no longer valid.

The necessary modifications of the T-criterion, for adapting it to elastic-plastic solutions, are presented here together with an illustrative example, comprising the case of the definition of the T-criterion by means of the singular plastic solutions of Hutchinson, Rice and Rosengren, henceforth denoted HRR, together with its mixed-mode extension studied by Shih [1][2][3][4]. It was shown that the T-criterion is still valid for elastic-plastic cases provided the components of energy are appropriately defined.