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Standard XII
Physics
Volume Stress
The minimum f...
Question
The minimum force needed to punch a hole of radius r in an iron plate of thickness d is \{ The ultimate shear stress of the iron is η \
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Q.
Calculate the force needed to punch a 1.46 cm diameter hole in a steel plate 1.27cm thick. The ultimate shear strength of steel plate is 345M N/m2 is
Q.
Calculate the force needed to punch a 1.46cm diameter hole in a steel plate is 1.27cm thick. The ultimate shear strength of steel is 345N/m2
Q.
Calculate the force
′
F
′
needed to punch a
1.46
c
m
diameter hole in a steel plate
1.27
c
m
thick. The ultimate shear strength of steel is
345
M
N
/
m
2
(Approx).
Q.
A hole 75 mm is to be punched in a steel plate 5.6 mm thick. The ultimate shear stress is
500
N
/
m
m
2
. It cutting is complete at 40 percent penetration of the punch and shear of 2 mm is provided on the punch , The minimum force required in the punch is ____kN
Q.
In a sheet metal of
2
mm thickness a hole of
10
mm diameter needs to be punched. The yield strength in tension of the sheet material is
100
MPa and its ultimate shear strength is
80
MPa. The force required to punch the hole (in kN) is
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