Reference : Modeling frictional contact conditions with the penalty method in the extended finite el...

	Document type :	Scientific conferences in universities or research centers : Scientific conference in universities or research centers
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering
	To cite this reference:	http://hdl.handle.net/2268/127203

Title :	Modeling frictional contact conditions with the penalty method in the extended finite element framework
Language :	English
Alternative title :	[en] Modélisation du contact frottant dans la méthode des élements finis étendus par la méthode de pénalité
Author, co-author :	Biotteau, Ewen [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
	Ponthot, Jean-Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
Publication date :	12-Sep-2012
Page number :	11
Audience :	International
Event name :	ECCOMAS
Event date :	du 10 septembre 2012 au 14 septembre 2012
Event place (city) :	Vienne
Event country :	Autriche
Keywords :	[en] extended finite element ; penalty method ; frictional contact
Abstract :	[en] This paper introduces an application of the eXtended Finite Element Method (XFEM) to model metal forming processes. The X-FEM is used to account for material interfaces and reduce the meshing constraints due to the shape of the tools and the evolving configuration of the structures. Large deformations and non-linear behaviors are also accounted for, but this contribution focuses in the modeling of frictional conditions on the interface. In X-FEM simulations, the constraint of impenetrability is usually imposed using Lagrange multiplier methods. For such strategies, stabilisation algorithms are needed to prevent the apparition of instabilities due to the introduction of dual unknowns. The strategy presented here proposes to manage the contact using the penalty approach. As it requires no additional variables, it is not submitted to the same kind of instabilities. The contact problem is modeled using integration sub-elements, defined on the boundary of the structure, on which the contact constraints have to be enforced.
Research units :	LTAS
Name of the research project :	ThixoWall
Permalink :	http://hdl.handle.net/2268/127203

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