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A parallel two mesh method for speeding-up processes with localized deformations: application to cogging

Abstract : In order to reduce the very long computational time required for the simulation of incremental processes such as cogging or ring rolling, a Bimesh method is proposed. It consists in using different finite element meshes for the resolution of the different physical problems: a main fine mesh to store the results and to carry out the thermal computations, and an intermediate coarser mesh for the mechanical calculations. It makes it possible to take advantage of the localised deformations that characterize incremental processes to coarsen the mechanical mesh and consequently reduce the computational time. After presenting the main components of these Bimesh method, the building of the embedded meshes and the data transfer between the meshes, its extension for parallel calculations are discussed, before analysing the obtained speed-ups for several cogging applications, both in sequential and in parallel.
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Mohamad Ramadan, Lionel Fourment, Hugues Digonnet. A parallel two mesh method for speeding-up processes with localized deformations: application to cogging. 12th ESAFORM Conference on Material Forming, Apr 2009, Enschede, Netherlands. pp.Pages 581-584, ⟨10.1007/s12289-009-0440-x⟩. ⟨hal-00509412⟩

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