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Element activation method and non-conformal dynamic remeshing strategy to model additive manufacturing
Laruelle, Cédric; Boman, Romain; Papeleux, Luc et al.
2021In ESAFORM 2021: proceedings of the 24th International Conference on Material Forming : 14-16 April 2021
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Element activation method and non-conformal dynamic remeshing strategy to model additive manufacturing – ESAFORM 2021.pdf
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Keywords :
Additive Manufacturing Simulation; Finite Element Activation; Remeshing; Non-conformal Mesh
Abstract :
[en] Modeling of Additive Manufacturing (AM) at the part scale involves non-linear thermo-mechanical simulations. Such a process also imposes a very fine discretization and requires altering the geometry of the models during the simulations to model the addition of matter, which is a computational challenge by itself. The first focus of this work is the addition of an additive manufacturing module in the fully implicit in-house Finite Element code Metafor [1] which is developed at the University of Liège. The implemented method to activate elements and to activate and deactivate boundary conditions during a simulation is adapted from the element deletion algorithm implemented in Metafor in the scope of crack propagation [2]. This algorithm is modified to allow the activation of elements based on a user-specified criterion (e.g. geometrical criterion, thermal criterion, etc.). The second objective of this work is to improve the efficiency of the AM simulations, in particular by using a dynamic remeshing strategy to reduce the computational cost of the simulations. This remeshing is done using non-conformal meshes, where hanging nodes are handled via the use of Lagrange multiplier constraints. The mesh data transfer used after remeshing is based on projection methods involving finite volumes [3]. The presented model is then compared against a 2D numerical simulation of Direct Energy Deposition of a High-Speed Steel thick deposit from the literature [4].
Disciplines :
Mechanical engineering
Author, co-author :
Laruelle, Cédric ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Boman, Romain  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique
Papeleux, Luc ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Ponthot, Jean-Philippe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
Element activation method and non-conformal dynamic remeshing strategy to model additive manufacturing
Publication date :
2021
Event name :
24th International Conference on Material Forming (ESAFORM 2021)
Event date :
14-16 avril 2021
Audience :
International
Main work title :
ESAFORM 2021: proceedings of the 24th International Conference on Material Forming : 14-16 April 2021
Peer reviewed :
Peer reviewed
Funders :
ULiège - Université de Liège [BE]
Available on ORBi :
since 12 April 2021

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