Analysis of industrial sheet metal forming processes using and enhanced rotation-free basic shell triangle

NEAMTU LAURENTIU; FLORES FERNANDO G.; OÑATE EUGENIO

Barcelona

Congreso; Computational Plasticity (COMPLASS IX); 2007

CIMNE

An enhanced rotation-free three node triangular shell element (termed EBST) is presented. The element formulation is based on a quadratic interpolation of the geometry in terms of the six nodes of a patch of four triangles associated to each triangular element. This allows to compute an assumed constant curvature field and an assumed linear membrane strain field which improves the in-plane behaviour of the element. A simple and economic version of the element using a single integration point is presented. The eficiency and accuracy of the EBST element using an explicit dynamic scheme are demonstrated in an example of application to a practical sheet metal stamping problem