A steel hole punch is shown in Figure P9-25a. Investigate the proper material for a hole punch. Tell me what material you used and why? Model the punch without the side groove (Figure P9-25b) and with the side groove (Figure P9-25c). Determine the von Mises stress distribution throughout the punch for both cases. Are the punches safe under the loading shown?

Figure P9-25

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1.25 in. 4 in. |гad 1/4 in. 2'in. гad 4 jn. in. 1.25 in. 6 in. гad 13000 psi -3/4 in. (a) (b) (c)