Steel rod AB bonded to the brass rod BCD as shown below. The steel rod has a diameter of 50 mm while the brass rod has an outer diameter of 40mm with segment BC being hollow with an inner diameter of 20 mm. If the assembly is loaded as shown, solve for the a. magnitude of the internal torque in the steel section (TAB) b. maximum shear stress in the steel section (TAB) C. maximum shear stress developed in the whole assembly (Tmax)
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- A transmission shaft supporting a helical gear B and an overhung bevel gear D is shown in Fig. bearings, A and C. The pitch circle diameter of the helical gear is 450 mm and the diameter of the bevel gear at the forces is 450 mm. Power is transmitted from the helical gear to the bevel gear. The gears are keyed to the shaft. The material of the shaft is steel 45C8 The factors k, and k, of ASME code are 2.0 and 1.5 respectively. Determine the shaft diameter using the ASME code. 400 The shaft is mounted on two 400 400 270 250 210 640i ]640 100Two equal gear wheel of 360 mm p.c.d and 6 module are in mesh if the pressure angle 20 determine the maximum addendum necessary if there are always to be at least two pairs of teeth in contact . if the gear wheels rorates at 110 r.p.m and 6 kw is being transmetted find the normal force between the teeth assuming that the total force is dividing equally between the two pairs of teeth Neglect the frection. (Ans 6.8mm , 1.54KN .)Q1: The arrangement of a transmission brake is shown in the figure. The arms are pivoted at O and, when force is applied at the end of the hand lever, the screw AB will rotate. The left-and right- hand threads working in nuts on the ends of the arms will move the arms together and thus apply the brake actuating force equally. A B 12cm The drum is 17.75cm diameter, and the angle subtended by each block is 90°. the friction material lining width is 4cm. Assuming a coefficient of friction for the braking surfaces that is equal to 0.30 Determine the force required by the screw AB to set the brake torque on the drum equal to 200 N-m. 17 75cm 12cm 46 35cm Torqueleft= TorqueRight= 97.40 N.m 6 35cm 102.60 N.m
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- thick lnange be! The total torque required to turn the double threaded power screw is 55 N.m. If the screw turns at 285 rpm and the pitch of 4mm, find: A. The horsepower input of the power screw. B. The efficiency if the weight loaded is 10 kN.A spur gear transmits 35 N · m of torque to the 20-mm-diameter driveshaft. The 5-mm-diameter setscrew threads onto the gear’s hub, and it is received in a small hole that is machined in the shaft. What's the factor of safety aganist yield under shear loadingd = 30 mm diameter, solid, ductile no.11 m from end A of vertical shaft AB made of materialtightly fitted to a radius disc, at end B to the groundfixed. From the C point of the disk - parallel to the y axisA force of F = 20 kN will be applied. Safety of the shaftcontrol according to Tresca criterion and Von-Mises criteriondo. (Due to the tight fit, the shaft is in the hole in the disc.cannot rotate freely.)
- A crank loaded by a force F 1300 N that causes twisting and bending of a 20 mm -in-diameter shaft. (a) Draw separate free-body diagrams of the shaft AB and the arm BC, and compute the values of all forces, moments, and torques that act. Label the directions of the coordinate axes on these diagrams. BC and indicate where these act. (b) Locate a stress element on the top surface of the shaft at A, and calculate all the stress components that act upon this element. (c) Determine the maximum normal and shear stresses at A.Adjustable pliers hold a round metal bar as a machinist grips the handles with P = 43 N. Using the free body diagram shown for the combined lower jaw and upper handle, calculate the force A that is applied to the bar. Assume lh = 160 mm and l2 = 15 mm. (Express your answer using three significant figures.) A =The shaft, is driven by pulley B from an electric motor. Another belt drivefrom pulley A is running a compressor. The belt tensions for pulley A are 1500 N and 600 N. The ratioof belt tensions for pulley B is 3.5. The diameter of pulley A is 150 mm and the diameter of pulley B is 480 mm. The allowable tensilestress for the shaft material is 170 MPa and the allowable shear stress is 85 MPa. Taking torsion andbending factors as 1.25 and 1.75 respectively, find the shaft diameter.Also find out the dimensions for a hollow shaft with outside diameter limited to 30 mm. Compare theweights of the two shafts. [Ans. 30 mm ; 24 mm ; 1.82 Given Length CD=350mm Length AB=150mm Length BD=100mm The total length is CD =350