A non-rotating torsion rod in shown in the diagram below must transmit a fluctuating amount of torque, the torque range is from 1000 Ibin to 19,500 lbin. The design is based on a design factor of 2.5 and that the drive key in the shaft causes a stress concentration of 1.75. The material will be machined from AISI/SAE 4140 annealed steel; the desired reliability is 99.9%. Base your calculations on the Goodman method for fluctuating shear stress of a ductile material. Provide a diagram to display the fluctuating load (10 pts) Provide all of your necessary calculations for the rest of the problem (10 pts) T What is the ultimate/tensile strength of the material based on the shear loading conditions? (accuracy +/- .25 ksi) Question 15 Calculate the alternating torque (accuracy +/- 50 lbin) Note this is torque not torsional shear stress Question 16 Calculate the mean torque. (Accuracy +/- 50 lbin) Note this is torque not torsional shear stress 10 pts 10 pts Question 17 Calculate the actual endurance strength in shear (S'sn). (accuracy +/- 1 KSI) Question 18 Calculate the require diameter for the shaft to satisfy the design requirements based on the Goodman method for fluctuating shear stress of a ductile material. (accuracy +/- .5 inch) Question 19 What is the closest nominal inch size as a decimal? (accuracy +/- .125") 10 pts 30 pts 10 pts