文档介绍：Numisheet 2008 September 1 - 5, 2008 – Interlaken, Switzerland
SHEET METAL FORMING SIMULATION
WITH ELASTIC TOOLS IN LS-DYNA
A. Haufe 1, K. Roll 2, P. Bogon 2
1 DYNAmore GmbH, Industriestrasse 2, D-70565 Stuttgart, Germany
2 Daimler AG, PK-PWT, D-71059 Sindelfingen, Germany
ABSTRACT: In recent years the development of more and more niche products has e a
remarkable trend in the automotive industry. This trend, however, generates higher costs for individual tool
geometries that are traditionally made as stiff as possible. A second trend is the increasing use of high and
ultrahigh strength steel grades for bodies in white. Here too the design philosophy for the tools in sheet
metal forming is based on a rather rigid and stiff tool approach. It is clear though, that a tremendous amount
of money could be saved by designing the tools such, that their elastic deformation during the forming
process is taken into account. This would lead to lighter and hence more inexpensive tools.
The traditional approach to design the tool geometry by finite element simulations is by rigid tools.
Obviously, if elastic deformations are to be accounted for in such models, the assumption of a rigid tool
geometry needs to be abandoned. Here the straight forward approach would be to discretize the tools by a
sufficiently accurate full 3D finite element