Reference : A damage to crack transition model accounting for stress triaxiality formulated in a ...
Scientific journals : Article
Engineering, computing & technology : Mechanical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/212933
A damage to crack transition model accounting for stress triaxiality formulated in a hybrid non-local implicit discontinuous Galerkin - cohesive band model framework
English
Leclerc, Julien mailto [Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Wu, Ling mailto [Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Nguyen, Van Dung mailto [Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Noels, Ludovic mailto [Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
In press
International Journal for Numerical Methods in Engineering
Wiley
Yes (verified by ORBi)
International
0029-5981
1097-0207
Chichester
United Kingdom
[en] Damage ; Fracture ; Discontinuous Galerkin Method ; Cohesive Band Method ; Cohesive Zone Method ; Stress Triaxiality ; LIMARC
[en] Modelling the entire ductile fracture process remains a challenge. On the one hand, continuous damage models succeed in capturing the initial diffuse damage stage but are not able to represent discontinuities or cracks. On the other hand, discontinuous methods, as the cohesive zones, which model the crack propagation behaviour, are suited to represent the localised damaging process. However, they are unable to represent diffuse damage. Moreover, most of the cohesive models do not capture triaxiality effect.
In this paper, the advantages of the two approaches are combined in a single damage to crack transition framework. In a small deformation setting, a non-local elastic damage model is associated with a cohesive model in a discontinuous Galerkin finite element framework. A cohesive band model is used to naturally introduce a triaxiality-dependent behaviour inside the cohesive law. Practically, a numerical thickness is introduced to recover a 3D-state, mandatory to incorporate the in-plane stretch effects. This thickness is evaluated to ensure the energy consistency of the method and is not a new numerical parameter. The traction-separation law is then built from the underlying damage model.
Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06
The research has been funded by the Walloon Region under the agreement no.7581-MRIPF in the context of the 16th MECATECH call
Researchers ; Professionals
http://hdl.handle.net/2268/212933
This is the submitted version of the paper "A damage to crack transition model accounting for stress
triaxiality formulated in a hybrid non-local implicit discontinuous Galerkin - cohesive band model framework, International Journal for Numerical Methods in Engineering VOL ##, PAGE #-#, 10.1002/nme.#" which has been published in final form on URL 10.1002/nme.#

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
2017_IJNME_CDMCBM.pdfAuthor postprint17.69 MBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.