#example 16.1
#page no. 396
# Given that
d=1.#in inch Diameter of the hole
T=(1./8.)#in inch thickness of the sheet
# Sample Problem on page no. 396
print("\n # Calculation of Punch Force# \n")
UTS=140000.#in psi Ultimate Tensile Strength of the titanium alloy Ti-6Al-4V
L=3.14*d#total length sheared which is the perimeter of the hole
F=0.7*T*L*UTS
F1=F*4.448/(10**6)
print'%s %.6f %s' %("\n\n Extrusion force=",F1,"MN")