Application of the continuum shell finite element SHB8PS to sheet forming simulation using an extended large strain anisotropic elastic-plastic formulationReport as inadecuate




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1 LEM3 - Laboratoire d-Etude des Microstructures et de Mécanique des Matériaux

Abstract : This paper proposes an extension of the SHB8PS solid-shell finite element to large strain anisotropic elasto-plasticity, with application to several non-linear benchmark tests including sheet metal forming simulations. This hexahedral linear element has an arbitrary number of integration points distributed along a single line, defining the -thickness- direction; and to control the hourglass modes inherent to this reduced integration, a physical stabilization technique is used. In addition, the assumed strain method is adopted for the elimination of locking. The implementation of the element in Abaqus-Standard via the UEL user subroutine has been assessed through a variety of benchmark problems involving geometric non-linearities, anisotropic plasticity, large deformation and contact. Initially designed for the efficient simulation of elastic-plastic thin structures, the SHB8PS exhibits interesting potentialities for sheet metal forming applications - both in terms of efficiency and accuracy. The element shows good performance on the selected tests, including springback and earing predictions for Numisheet benchmark problems.

Keywords : Solid-shell element Reduced integration Physical stabilization Assumed strain method Elastic-plastic behavior Anisotropic plasticity Sheet metal forming Springback





Author: Abdellah Salahouelhadj - Farid Abed-Meraim - Hocine Chalal - Tudor Balan -

Source: https://hal.archives-ouvertes.fr/



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