Open Access

Table 3

Confirmation test.

S.No Punch travel (mm) Strain hardening index Holding time (min) Punch velocity (mm/s) Width of the sheet (mm) Springback degree experimental value Springback degree predicted value Error %
1 10 0.22 2.5 0.666 40 3.7 4.125 11.4
2 15 0.27 5 0.499 70 1.7 1.95 14

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