[en] Friction stir welding (FSW) process is a solid‐state joining process during which materials to
be joined are not melted. As a consequence, the heat‐affected zone is smaller and the quality
of the weld is better with respect to more classical welding processes. Because of extremely
high strains in the neighborhood of the tool, classical numerical simulation techniques have
to be extended in order to track the correct material deformations. The Arbitrary
Lagrangian–Eulerian (ALE) formulation is used to preserve a good mesh quality throughout
the computation. With this formulation, the mesh displacement is independent from the
material displacement. Moreover, some advanced numerical techniques such as remeshing
or a special computation of transition interface is needed to take into account non‐cylindrical
tools. During the FSW process, the behavior of the material in the neighborhood of the tool is
at the interface between solid mechanics and fluid mechanics. Consequently, a numerical
model of the FSW process based on a solid formulation is compared to another one based on
a fluid formulation. It is shown that these two formulations essentially deliver the same
results in terms of pressures and temperatures.
Disciplines :
Mechanical engineering
Author, co-author :
Bussetta, Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Dialami, Narges; Universidad Politecnica de Cataluna
Boman, Romain ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique
Chiumenti, Michele; Universidad Politecnica de Cataluna
Agelet de Saracibar, Carlos; Universidad Politecnica de Cataluna
Cervera, Miguel; Universidad Politecnica de Cataluna
Ponthot, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
Comparison of a Fluid and a Solid Approach for the Numerical Simulation of Friction Stir Welding with a Non‐Cylindrical Pin
Publication date :
2014
Journal title :
Steel Research International
ISSN :
1611-3683
eISSN :
1869-344X
Publisher :
Verlag Stahleisen GmbH, Dusseldorf, Germany
Volume :
85
Issue :
6
Pages :
968-979
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
STIRHETAL
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie [BE]
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