Reference : A two-scale model predicting the mechanical sliding and opening behavior of grain bounda...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Materials science & engineering
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/2268/99054
A two-scale model predicting the mechanical sliding and opening behavior of grain boundaries in nanocrystalline solids
English
Péron-Lührs, Vincent mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Milieux continus et thermomécanique >]
Jérusalem, Antoine [IMDEA Materials > > > >]
Sansoz, Frédéric [The University of Vermont > > > >]
Stainier, Laurent [Ecole Centrale de Nantes > > > >]
Noels, Ludovic mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Nov-2011
Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Hogge, Michel
Van Keer, Roger
Dick, Erik
Malengier, Benny
Slodicka, Marian
Geuzaine, Christophe
Béchet, Eric
Noels, Ludovic
Remacle, Jean-François
9
No
No
International
978-2-9601143-1-7
5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
14-17 november 2011
Université de Liège, Universiteit Gent, Université Catholique de Louvain
Liège
Belgium
[en] In polycrystalline materials with nanosized grains smaller than 100 nm, the deformation mechanisms taking place at grain boundaries (GBs) become dominant compared to intragranular crystal plasticity. Recent studies have revealed that more accurate mechanical properties can be obtained by choosing the relevant GB character distribution (GBCD). We use here a numerical multiscale approach (an extension of a previous work [1]) to predict the mechanical behavior of nanostructured metals according to their GBCD composed of either high angle GBs (HAB) or low angle GBs (LAB). The quasicontinuum method (QC) is used to obtain the GB mechanical response at the nanoscale under simple shear (sliding part) and tensile load (opening part). These QC results are then used in a finite element code (direct numerical simulation-DNS) as GB constitutive models. This two-scale framework does not suffer from length scales limitations conventionally encountered when considering the two scales separately.
Researchers ; Professionals
http://hdl.handle.net/2268/99054
http://www.ltas.ulg.ac.be/acomen2011/NewWebSite/docs/Abstracts/Numerical_Multiscale_Methods/Numerical%20Multiscale%20Methods01V2.pdf

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