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A finite element investigation of the effect of crack tip constraint on hole growth under mode I and mixed mode loading

Roy, Arun Y and Narasimhan, R (1999) A finite element investigation of the effect of crack tip constraint on hole growth under mode I and mixed mode loading. In: International Journal of Solids and Structures, 36 (10). pp. 1427-1447.

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Abstract

In this work, the effect of constraint on hole growth near a notch tip in a ductile material under mode I and mixed mode loading (involving modes I and II) is investigated. To this end, a 2-D plane strain, modified boundary layer formulation is employed in which the mixed mode elastic K-T field is prescribed as remote boundary conditions. A finite element procedure that accounts for finite deformations and rotations is used along with an appropriate version of J(2) flow theory of plasticity with small elastic strains. Several analyses are carried out corresponding to different values of T-stress and remote elastic mode-mixity. The interaction between the notch and hole is studied by examining the distribution of hydrostatic stress and equivalent plastic strain in the ligament between the notch tip and the hole, as well as the growth of the hole. The implications of the above results on ductile-fracture initiation due to micro-void coalescence are discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 21 Jul 2009 10:59
Last Modified: 19 Sep 2010 04:58
URI: http://eprints.iisc.ernet.in/id/eprint/17776

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