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Calculate the force 'F' needed to punch ...

Calculate the force `'F'` needed to punch a `1.46cm` diameter hole in a steel plate `1.27cm` thick. The ultimate shear strength of steel s `345M N//m^(2)` (Approx).

A

`300 KN`

B

`400 KN`

C

`200 KN`

D

`100 KN`

Text Solution

Verified by Experts

The correct Answer is:
C
As in punching shear elasiticity is involved, the hole will be punched it
`((F_(11))/(A)) gt` ultimate shear stress
`F_(11) gt ("Shear stress") xx "Area", [A = 2pi rL]`
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