def Problem2():
"""What is the torque, in pound-inches,
required to raise a 6 kip load using a
square thread power screw with a major
diameter of 2.3 inches and a pitch of
0.2 inches? Assume the screw to be single
threaded and the friction on the thread
to be 0.15. There is no collar."""
F = 6000 #lb
# dc = 2.8 #in
d = 2.3 #in (Major diameter)
p = 0.2 #in
dm = d - p / 2 # (Median diameter)
ft = 0.14
l = p #Single threaded
ans = Screw.TorqueRaiseThread(F, dm, ft, l)
print(ans)
def Problem2():
"""What is the torque, in pound-inches,
required to raise a 6 kip load using a
square thread power screw with a major
diameter of 1.7 inches and a pitch of
0.6 inches? Assume the screw to be single
threaded and the friction on the thread
to be 0.10. There is no collar."""
F = 6000 #kips
p = 0.6 #in
d = 1.7 #in
dm = d - p / 2
f = 0.1
l = p * 1 # lead for single threaded
Tr = F * dm / 2 * (l + np.pi * f * dm) / (np.pi * dm - f * l)
Tr2 = Screw.TorqueRaiseThread(F, dm, f, l)
print(Tr, Tr2)
