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Void Shape and Distribution Effects on Coalescence in Elastic-Plastic Solids

Published online by Cambridge University Press:  15 February 2011

T. Pardoen  and
J.W. Hutchinson
T. Pardoen
Affiliation:
Division of Engineering and Applied Sciences, Harvard University, Pierce Hall, Cambridge, MA 02138, U.S.
J.W. Hutchinson
Affiliation:
also Université catholique de Louvain, Département des Sciences des Matériaux et Procédés, PCIM, Bátiment Réaumur, 2 Place Sainte Barbe, 1400 Louvain-la-Neuve, Belgium
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Abstract

An extended Gurson model incorporating the effects of the void shape and distribution on the growth and coalescence is proposed. The emphasis is placed on void coalescence, which is modeled as a transition from diffuse plasticity around the void to transverse localized plastic yielding in the intervoid ligament. Selected results showing the importance of correctly accounting for the void coalescence stage, as well as for the void shape and distribution effects, are presented and discussed.

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References

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