Sheet Forming with a specific Inverse Approach for a further Springback Analysis

During the design of pressed parts, an ‘incremental’ F.E. algorithm presents the major disadvantage of an important computation time and its substitution by a ‘one‐step’ simulation seems attractive. But, if a springback incremental implicit analysis starts with a stress state coming from an ordinary one‐step inverse computation, the final shape is not correct in general. To change this established fact, we propose an additional procedure which applies curvatures to elements located on a ‘curvature path’. This specific formulation is based on successive proportional loadings — even with a combined hardening — to keep the advantage of a short computation time.