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)