AMM provides multiple mathematical
models for curve fitting and extrapolation according to solver requirements. Additionally,
the expert mode enables you to create strain-rate curves, failure criteria, and run
validation simulations.
In some cases, a curve fitting method underestimates the extrapolated material,
while another method overestimates the material hardening.
Select a pair of curves from the list (press the ctrl key and
left-click).
Note: The default ratio of the interpolated curve is 0.5,
which means both curves contribute 50% to the new interpolated curve.
To alter this ratio, use the slider to change the contribution between the
source curves, and then review the results.
The initial curve (blue). The dashed red curve defines the necking point (begin
of material instability), and the green curve represents the resultant
curve.Figure 1. Extrapolation
Raw data curve (blue); fitted and extrapolated curve (green) and its first
derivative (red). The intersection between the blue and red curves indicates the
necking point.
If the resultant curve is satisfactory, click Save and
save the result for the next step.
