Metall. Res. Technol.
Volume 114, Number 6, 2017
|Number of page(s)||9|
|Published online||19 September 2017|
Methodology to assess fracture during crash simulation: fracture strain criteria and their calibration
ArcelorMittal Maizières Research SA, Voie Romaine,
2 ArcelorMittal, Automotive Products Development, 17 avenue des tilleuls, 57190 Florange, France
* e-mail: email@example.com
Received in final form: 4 November 2016
Accepted: 9 November 2016
The use of Advanced High Strength Steels (AHSS) has greatly increased this last decade in the automotive industry. Because of their crash performance and their weight saving potential, these grades constitute a possible solution to achieve the safety and environmental regulations objectives. Nevertheless, the increase of tensile strength of these materials is generally associated with a loss of ductility compared to conventional steels. Thus, the prediction of their failure in crash loading conditions become of great importance for the design of vehicles. This paper proposes to calibrate for any AHSS, as Dual-Phase or Press Hardened Steels, different failure criteria, available in finite element software. First, specific tests and methodologies for strain measurement needed for models calibration are exposed. Second, an overview of these tested models and the procedure applied to take into account mesh dependency are provided. Finally, simulations results are compared with experiment on a real automotive component.
Key words: failure characterization / failure prediction / crash / LS-DYNA / CrachFEM
© EDP Sciences, 2017
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