A disc of 200 mm diameter is blanked from a strip of an

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A disc of 200 mm diameter is blanked from a strip of an aluminum alloy of thickness 3.2 mm. The material shear strength to fracture is 150 MPa. The blanking force (in kN) is

1. 291
2. 301
3. 311
4. 421

Correct Option: B

Blanking force = πDtτ
= π × 200 × 3.2 × 150 = 301.59 KN