Formability and Spring Back Characterization of Advanced High Strength Steel

Kamura, M.; Omiya, Y.; Shaw, Jody; Chen, Ming

doi:10.4271/2003-01-0522

Cited by 3 publications

(1 citation statement)

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“…It has a significant deformation hardening and is therefore suitable for deep-drawn parts which have demands on both high formability and high strength. The formability has been studied by Konieczny [10] and Kamura et al [11], who found that TRIP steel has good formability and is suitable for automotive applications. However, as this material is used to a small extent in the automotive industry and it therefore was of interest to include it in this study.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental evaluation of springback in a front side member

Andersson

2005

Journal of Materials Processing Technology

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Changes in geometry after springback are a major problem for the automotive industry. In order to make adjustments of the part to be formed, extra processes are needed. Since their implementation is both time-consuming and expensive, the industry would stand to gain if geometrical changes could be predicted at the time that the tool is being designed. Today, sheet-metal-forming simulations are, to a large extent, used to evaluate the forming process. Reliable results of the forming process can be obtained regarding, for instance, thinning, forces and fractures, but prediction of springback is not accurate enough to be fully reliable. Furthermore, the introduction of new, high strength steels, such as TRIP steels, emphasize the springback problem even more. This demands an increased ability to accurately predict the outcome of the forming process.In this study a part of an automotive side front section (front side member inner) was studied and a comparison both regarding material behaviour and of accuracy of the FE simulations was made. Mild steel, Rephos steel and TRIP700 were compared both experimentally and numerically. The results showed that TRIP steel has a significantly larger springback than the other materials. Furthermore, the FE simulations overestimate the twisting in this part for all materials, with the TRIP material showing the largest deviation between the experiments and the simulations. The prediction of punch forces was, however, accurate for all materials.

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Section: Introductionmentioning

confidence: 99%