Problem # p024 |

In the figure to the left the punch of diameter d
is pushed through a metal sheet of thickness t by a force P
to create a disk of diameter d and thickness t.How big must the force
P be if - the ultimate shear stress the material of the metal sheet is
**250 MPa**,
- the diameter of the disk
**d = 15 mm** - the thickness of the metal sheet
**t = 2 mm**
At the same value of
P, how big is the axial stress in the punch ? |