Formability limit curves under stretch-bending

A. Martinez Lopez, Antonius H. van den Boogaard

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A common strategy for stabilizing the greenhouse gas concentrations in the atmosphere was the introduction of new emissions limits for cars, and light commercial vehicles. For that reason the automotive industry is facing new challenges in order to fulfill these considerations. One of the strategies attained, is to employ new grades of Advanced High-Strength Steel (AHSS) to replace conventional steels in vehicle’s body structures. These changes are intended to reduce the estimated total weight and increase fuel efficiency of vehicles. The main focus of this research is to derive a stability model which can encounter the enhanced formability obtained when simultaneous bending and stretching are applied to a sheet metal. Since experimental data is already available, it will be used for validation purposes. A sensitivity analysis in terms of different punch radii during the Nakazima test will be presented.
Original languageEnglish
Title of host publicationProceedings of the 15th International Deep Drawing Research Group Conference: IDDRG 2011
Place of PublicationBilbao, Spain
PublisherInternational Deep Drawing Research Group
Number of pages8
Publication statusPublished - 5 Jun 2011
Event15th International Deep Drawing Research Group Conference 2011: Towards sustainable sheet forming processes - Bilbao, Spain
Duration: 5 Jun 20118 Jun 2011
Conference number: 15


Conference15th International Deep Drawing Research Group Conference 2011
Abbreviated titleIDDRG 2011


  • Formability
  • FLC
  • AHSS
  • Stretch-Bending
  • METIS-279890
  • IR-78476

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