Plastic Flow Localization and Ductile Fracture

Viggo Tvergaard

doi:10.1088/1742-6596/1063/1/012005

Plastic Flow Localization and Ductile Fracture

Viggo Tvergaard^*

^*Corresponding author for this work

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Abstract

To treat tensile instabilities the main points of the theory of uniqueness and bifurcation in elastic-plastic solids are outlined. Also simple theories for localization of plastic flow are discussed. Instability predictions are highly sensitive to the material model applied. Ductile fracture in metals involves the nucleation and growth of micro-voids to coalescense. Such porous ductile materials also show localization of plastic flow. Analyses for low stress triaxiality show failure mechanisms involving collapse of voids into micro-cracks that subsequently interact.

Original language	English
Article number	012005
Book series	Journal of Physics: Conference Series
Volume	1063
Issue number	1
Number of pages	7
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/1063/1/012005
Publication status	Published - 2018

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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AB - To treat tensile instabilities the main points of the theory of uniqueness and bifurcation in elastic-plastic solids are outlined. Also simple theories for localization of plastic flow are discussed. Instability predictions are highly sensitive to the material model applied. Ductile fracture in metals involves the nucleation and growth of micro-voids to coalescense. Such porous ductile materials also show localization of plastic flow. Analyses for low stress triaxiality show failure mechanisms involving collapse of voids into micro-cracks that subsequently interact.

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Plastic Flow Localization and Ductile Fracture

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