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

作者：Salahouelhadj A; Abed Meraim F^*; Chalal H; Balan T

来源：Archive of Applied Mechanics, 2012, 82(9): 1269-1290.

DOI：10.1007/s00419-012-0620-x

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

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.

• 出版日期2012-9