Determine the load required to punch a 20 mm diameter hole

Home » Materials Science and Manufacturing Engineering » Materials Science and Manufacturing Engineering Miscellaneous » Question

Determine the load required to punch a 20 mm diameter hole in 2 mm thick sheet. The properties of the material of the sheet are: Tensile strength – 580 MPa
Yield strength in tension – 410 MPa
Shear strength – 350 MPa
Yield strength in shear – 250 MPa
The load in kN is

1. 31.40
2. 43.98
3. 64.40
4. 91.10

Correct Option: B

Punching force = πDtτ
= π × 20 × 2 × 350 = 43.98 KN.