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Computational Mechanics
Erschienen in: Computational Mechanics 1/2016

01.01.2016 | Original Paper

A phase-field model for ductile fracture at finite strains and its experimental verification

verfasst von: Marreddy Ambati, Roland Kruse, Laura De Lorenzis

Erschienen in: Computational Mechanics | Ausgabe 1/2016

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Abstract

In this paper, a phase-field model for ductile fracture previously proposed in the kinematically linear regime is extended to the three-dimensional finite strain setting, and its predictions are qualitatively and quantitatively compared with several experimental results, both from ad-hoc tests carried out by the authors and from the available literature. The proposed model is based on the physical assumption that fracture occurs when a scalar measure of the accumulated plastic strain reaches a critical value, and such assumption is introduced through the dependency of the phase-field degradation function on this scalar measure. The proposed model is able to capture the experimentally observed sequence of elasto-plastic deformation, necking and fracture phenomena in flat specimens; the occurrence of cup-and-cone fracture patterns in axisymmetric specimens; the role played by notches and by their size on the measured displacement at fracture; and the sequence of distinct cracking events observed in more complex specimens.
Vorheriger Artikel Modified SFEM for computational homogenization of heterogeneous materials with microstructural geometric uncertainties

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Metadaten
Titel
A phase-field model for ductile fracture at finite strains and its experimental verification
verfasst von
Marreddy Ambati
Roland Kruse
Laura De Lorenzis
Publikationsdatum
01.01.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Computational Mechanics / Ausgabe 1/2016
Print ISSN: 0178-7675
Elektronische ISSN: 1432-0924
DOI
https://doi.org/10.1007/s00466-015-1225-3

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