Forming Limit Curve (FLC)
The stress-strain curve of a material illustrates its mechanical properties and gives the forming limit beyond which it fails. Inspire Form supports several methods for calculating the stress-strain curve.
Keeler – Beizer (Original)
Keeler – Beizer (Modified I)
Keeler – Beizer (Modified II)
NADDRG
Abspoel & Scholting
Inputs : Sheet thickness (t), Strain hardening (n), Total elongation in 0 degree (A80), Min Total elongation among all directions and Average Anisotropy (r).
- Point 1: TE
- No thickness dependency for the validity of the equation.
- Point 2: PS
- No thickness dependency for the validity of the equation.
- Point 3: IM
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- If thickness (t) is less than or equal to
- If thickness is greather than
- Point 4: BI
-
- If thickness (t) is less than or equal to
- If thickness is greather than