International Deep Drawing Research Group

International Deep Drawing Research Group (IDDRG)

The International Deep Drawing Research Group (IDDRG) focuses on sheet metal research in industry and academia. It was started 1957 as an organization of national groups. The original focus was on the fabrication of cups hence the name Deep Drawing Research Group. At the initial meeting the purpose was enlarged to do cooperative research on tests, materials, and processes. Such work included for example, methods for determining the strain hardening exponent n, the anisotropy-values (lankford coefficient), as well as other tests for sheet metal formability and, later, forming limit diagrams.