Adapting sheet metal to the stamping process
Sheet metal stamping - Mechanical aspect

As we have seen, in paragraph 3.4 of article , the anisotropy coefficient r reflects the metal's tendency, during a tensile test, to deform in width rather than thickness. Note that this behavior is true in both directions: if r is high, the metal also thickens, but in compression. We also saw, in paragraph 1.1 of the article that the deformation mode known as swaging requires a reduction in (circumferential) width under tension for the metal to penetrate the die.

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