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A two-scale model predicting the mechanical sliding and opening behavior of grain boundaries in nanocrystalline solids
Péron-Lührs, Vincent; Jérusalem, Antoine; Sansoz, Frédéric et al.
2011In Hogge, Michel; Van Keer, Roger; Dick, Erik et al. (Eds.) Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
 

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Abstract :
[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.
Disciplines :
Mechanical engineering
Materials science & engineering
Author, co-author :
Péron-Lührs, Vincent ;  Université de Liège - ULiège > 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  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Language :
English
Title :
A two-scale model predicting the mechanical sliding and opening behavior of grain boundaries in nanocrystalline solids
Publication date :
November 2011
Event name :
5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Event organizer :
Université de Liège, Universiteit Gent, Université Catholique de Louvain
Event place :
Liège, Belgium
Event date :
14-17 november 2011
Audience :
International
Main work title :
Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011)
Editor :
Hogge, Michel
Van Keer, Roger
Dick, Erik
Malengier, Benny
Slodicka, Marian
Geuzaine, Christophe
Béchet, Eric
Noels, Ludovic  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Remacle, Jean-François
ISBN/EAN :
978-2-9601143-1-7
Pages :
9
Available on ORBi :
since 21 September 2011

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