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Computational simulation of localized damage by finite element remeshing based on bubble packing method. (English) Zbl 1063.74539

Summary: An automatic finite element remeshing algorithm based on the bubble packing method is utilized for the purpose of numerical simulations of localized damage, because fine meshes are needed to represent the gradually concentrated damage. The bubble packing method introduces two parameters that easily control the remeshing criterion and the new mesh size. The refined area is determined by a posteriori error estimation utilizing the value obtained from superconvergent patch recovery. The isotropic ductile damage theory, founded on continuum damage mechanics, is used for this damage analysis. It was successfully shown in the numerical examples (upsetting and extrusion problems) that the remeshing algorithm generates fine and regular meshes for the regions with distorted meshes, and that the damage is localized in the refined zone.

MSC:

74S05 Finite element methods applied to problems in solid mechanics
74R20 Anelastic fracture and damage

Keywords:

metal forming
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