Community Research and Development Information Service - CORDIS

Abstract

The focus of this project has been to improve the ability to predict the properties of the steel sheet parts during and after forming, especially spring-back and forming limits. Thus the objective of the project was the implementation of up-to-date material behaviour models in finite element codes and the development of new, adapted material behaviour models. The implementation has been made available in commercially available design codes (Abaqus/Explicit, Abaqus/Standard, PamStamp). The work in the project followed a threefold structure: experimental, theoretical and numerical. - Extensive experimentations have been set forth in order to characterise multiple facets of the material behaviour and further provide validation and application data. In particular, the strain localisation phenomena have been given particular attention. - The theoretical modelling work consisted in coupling accurate hardening models with an anisotropic yield surface, a damage model and a strain localisation criterion, providing a common material model framework for all stages of the steel sheet forming. - The theoretical developments have been implemented in three finite element codes, using several time integration procedures, thus providing different ratios of accuracy vs. robustness. The numerical simulations have been compared with the experimental tests. The project has led to significant clarification of the experimental and numerical conditions of investigation of the forming of the selected - and similar - materials. The stretch-forming and spring-back tests have been ameliorated and validated. The usefulness of the improved model has been demonstrated. New and useful observations have been made concerning the effect of strain-rate or friction on the experimental and computational results. Important advances have been made in the numerical implementation of material models specific to sheet steel forming. A valuable database of advanced material model parameters has been initiate

Additional information

Authors: No author stated, European Commission, DG Research, Brussels (BE)
Bibliographic Reference: EUR 22836 EN (2007), 34 pp. Free of charge
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=KINA22836 (Catalogue Number: KI-NA-22836-EN-C)
ISBN: ISBN: 978-92-79-05521-8
Record Number: 200719490 / Last updated on: 2007-10-19
Category: PUBLICATION
Original language: en
Available languages: en