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Phase-Field Model for the Simulation of Brittle-Anisotropic and Ductile Crack Propagation in Composite Materials

Herrmann, Christoph 1; Schneider, Daniel ORCID iD icon 1; Schoof, Ephraim 1; Schwab, Felix; Nestler, Britta 1
1 Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS), Karlsruher Institut für Technologie (KIT)

Abstract:

In this work, a small-strain phase-field model is presented, which is able to predict crack propagation in systems with anisotropic brittle and ductile constituents. To model the anisotropic brittle crack propagation, an anisotropic critical energy release rate is used. The brittle constituents behave linear-elastically in a transversely isotropic manner. Ductile crack growth is realised by a special crack degradation function, depending on the accumulated plastic strain, which is calculated by following the J2-plasticity theory. The mechanical jump conditions are applied in solid-solid phase transition regions. The influence of the relevant model parameters on a crack propagating through a planar brittle-ductile interface, and furthermore a crack developing in a domain with a single anisotropic brittle ellipsoid, embedded in a ductile matrix, is investigated. We demonstrate that important properties concerning the mechanical behaviour of grey cast iron, such as the favoured growth of cracks along the graphite lamellae and the tension–compression load asymmetry of the stress–strain response, are covered by the model. The behaviour is analysed on the basis of a simulation domain consisting of three differently oriented elliptical inclusions, embedded in a ductile matrix, which is subjected to tensile and compressive load. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000138080
Veröffentlicht am 28.09.2021
Originalveröffentlichung
DOI: 10.3390/ma14174956
Scopus
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000138080
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Materials
Verlag MDPI
Band 14
Heft 17
Seiten Art.-Nr.: 4956
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 30.08.2021
Schlagwörter phase-field; multiphase-field; grey cast iron; brittle fracture; ductile fracture; anisotropic fracture
Nachgewiesen in Web of Science
Dimensions
Scopus
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