Question

I WILL RATE

The solid cast-iron post shown in the figure below is lightly buried in the soil at point B.Its diameter d is d= 0.04 m, and length lis 1=0.6 m. If a torque is applied to its top using a rigid wrench, determine the maximum shear stress in the post and the angle of twist at its top. The magnitude of the force couple Fis F= 200 N. Assume that the torque is about to turn the post, and the soil resists the turning of the post. Take G = 40 GPa. Enter your answers as positive numbers. 0.2 m F 0.2 m F d B Tmax Pa [5 marks] o= rad [5 marks]

Answer 1

t max = 6366385.48 pa

angle = 0.00477 radians

- of Torque EX(02+0.2) 200 X 0.4 > Sonm G da) Oferim 0.04 Jy Polar moment Inertia JOf & Circular rod, Id4 32 J= T (0.04) 24 32 J= 2.5132x10] maximum shear occurs at maximum radis ie R=0.02 Torsion equalion ㄷ Go 2 r J 80 2.5132x10 Tmar کو فرعوها 0.02 0.6 Tmax = 63 66 38 5.48 Pa 4.774 x 103 rad