Finite Deformation Analysis of Cracked Specimen in Large Scale Yielding

Saka, Masumi; Shoji, Tetsuo; Takahashi, Hiroki; Abe, Hiroyuki

doi:10.1299/kikaia.47.148

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1984

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“…The blunting of crack tip has been analysed by employing the rigid plastic slip line theory or the finite element method by Rice and Johnson [1], McMeeking [2], Miyoshi and Shiratori [3], and Saka et al [4], and it has been pointed out that large geometry change effects are important. Theoretical investigations on the growth of a single void in an infinite body of plastic material have been presented by McClintock [5], Rice and Tracey [6], and Budiansky et al [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of microvoids on crack blunting and initiation in ductile materials

et al. 1984

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Effects of microvoid nucleation and growth on the stress and strain fields near a crack tip are studied by employing the Gurson's constitutive model of porous plastic solids and by using a finite element method suitably formulated to admit large geometry change. It is shown that microvoids nucleate and grow rapidly in the region at a distance less than the blunted tip diameter away from the crack tip and have a great influence on the stress fields therein. Effects of a large void near a crack tip on crack initiation are also investigated by taking the shear localization into account. The critical value of the crack tip opening displacement predicted by the present investigation is shown to coincide with the published experimental data.

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