Reference : Enhanced ALE Data Transfer Strategy for Explicit and Implicit Thermomechanical Simula...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Enhanced ALE Data Transfer Strategy for Explicit and Implicit Thermomechanical Simulations of High-Speed Processes
Boman, Romain mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique >]
Ponthot, Jean-Philippe mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
International Journal of Impact Engineering
Pergamon Press - An Imprint of Elsevier Science
Special issue based on contributions at the 3rd International Conference on Impact Loading of Lightweight Structures
Yes (verified by ORBi)
United Kingdom
[en] ALE formalism ; Transfer algorithms ; Taylor impact ; Split Hopkinson Tensile Bar ; Zerilli-Armstrong model
[en] The Arbitrary Lagrangian Eulerian (ALE) formalism, which allows the computational grid to
move regardless of thematerial deformation, is a convenient way to avoid distortedmeshes in finite
element simulations. One crucial step of the ALE algorithm is the data transfer between the Lagrangian and the Eulerian meshes. In this paper, an enhanced transfer method is presented. It can handle complex finite elements which are integrated with more than one Gauss point. This method can thus be used either with an explicit or with an implicit time integration scheme. Choosing the adequate order of accuracy and the most appropriate number of physical fields to be transferred is always a compromise between the speed and the precision of the model. For example, some variables may be sometimes ignored during the transfer in order to decrease the CPU time. Therefore, the most effective way to use such an algorithm is demonstrated in this work by revisiting a classical ALE benchmark, the Taylor impact. An implicit thermomechanical ALE simulation of a high-speed tensile test is also presented and is compared to experimental results from the literature.
Researchers ; Professionals

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