Mechanical Engineering - Machine Design - Discussion
Discussion Forum : Machine Design - Section 9 (Q.No. 45)
45.
When a hole of diameter 'd' is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)
d.t.τu
πd.t.τu
x d2τu x d2 x tτuDiscussion:
3 comments Page 1 of 1.
Divashu Guleria said:
4 years ago
Given Answer is correct as the force will act at the circumference and not the whole area.
Sadfadq said:
5 years ago
Answer should be D.
Ravi gupta said:
8 years ago
The answer should be D.
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