Kabir, Rizviul und Bartsch, Marion (2015) Modelling of fracture of single crystal lamellar TiAl alloys using a two-scale finite element approach. Euromec 559-Multi-scale computational methods for bridging scales in materials and structures, 2015-02-23 - 2015-02-25, Eindhoven, NL.
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Kurzfassung
Fracture in lamellar structure of a TiAl single crystal (known as PST crystal) has been modelled using two-scale finite element modelling approach including cohesive fracture behaviour. In this approach the representative microstructure of two-phase lamellae has been simplified in a unit cell model. The lamellar fracture, which can be interlamellar and translamellar type, has been described in the unit cells where the underlying debonding and cleavage mechanisms have been captured using cohesive damage behaviour. The macroscopic response of material failure has been calculated from the lower scale unit cell deformation and fracture behaviour. Stress-strain behaviour of undamaged state has been calculated using first order homogenization approach and the damaged behaviour has been calculated averaging the local stress-strain evolution at the damage zone after the onset of cracks as described by cohesive model. In this work we will demonstrate the proposed modelling approach for capturing micro-meso fracture with numerical examples. In addition, the cohesive model parameters for interlamellar and translamellar fracture will be estimated fitting the model response to the experimental obtained data for single crystal tensile fracture behaviour of a TiAl alloy.
elib-URL des Eintrags: | https://elib.dlr.de/98351/ | ||||||||||||
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Dokumentart: | Konferenzbeitrag (Poster) | ||||||||||||
Titel: | Modelling of fracture of single crystal lamellar TiAl alloys using a two-scale finite element approach | ||||||||||||
Autoren: |
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Datum: | 24 Februar 2015 | ||||||||||||
Referierte Publikation: | Nein | ||||||||||||
Open Access: | Nein | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Nein | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Two-scale model, lamellar fracture, TiAl alloy, cohesive model | ||||||||||||
Veranstaltungstitel: | Euromec 559-Multi-scale computational methods for bridging scales in materials and structures | ||||||||||||
Veranstaltungsort: | Eindhoven, NL | ||||||||||||
Veranstaltungsart: | Workshop | ||||||||||||
Veranstaltungsbeginn: | 23 Februar 2015 | ||||||||||||
Veranstaltungsende: | 25 Februar 2015 | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Antriebssysteme | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L ER - Engine Research | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtuelles Triebwerk und Validierungsmethoden (alt) | ||||||||||||
Standort: | Köln-Porz | ||||||||||||
Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Experimentelle und numerische Methoden | ||||||||||||
Hinterlegt von: | Kabir, Dr. -Ing Mohammad Rizviul | ||||||||||||
Hinterlegt am: | 28 Sep 2015 08:00 | ||||||||||||
Letzte Änderung: | 24 Apr 2024 20:03 |
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