Elastic-plastic fracture analysis of finite bodies—I. Description of the stress field

✍ Scribed by Ma Fashang; Kuang Zhen-Bang

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 818 KB
• Volume: 48
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(94)90179-1

✦ Synopsis

Stress and deformation

were analyzed in detail by the large deformation plane strain finite element method for several specimens. An elastic-plastic stress field near a blunting crack tip in finite bodies was constructed;

the stress field was composed of a dominant term with a different singularity from that of the Hutchinson-Rice-Rosengren (HRR) field, and a hydrostatic stress term. It was proved that the present stress field satisfies the equations of equilibrium of stresses and compatibility of strains in solid mechanics. The field was applied to describe the stresses near a blunting crack tip and the crack blunting for several specimens. Finally, the significance of crack tip blunting was discussed by extension of the damaged zone of the crack tip.