2. For the system shown below, compute the maximum torque it can accommodate if a is 2000mm andb is 1500mm. Assume that the bronze segment, has a diameter of o.075m, i < 60 MPa, and G = 35x10^3 MPa. On the other hand, assume the steel segment has a diameter of 0.05m, t< 80 MPa, and G = 83x10^3 MPa. a b A B
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- The problem is stated below. However, change the position of torque to point C from point D. What is the effect of variation of torque placement in shaft CB?Q A shaft rotating at 200 r.p.m. drives another shaft at 300 r.p.m. and transmits 6 kW through a belt. The belt is 100 mm wide and 10 mm thick. The distance between the shafts is 4m. The smaller pulley is 0.5 m in diameter. Calculate the stress in the belt, if it is . An open belt drive, and 2. A cross belt drive. (Take μ = 0.3)Mechanical design A shaft with the following data: 1- The pulley (A) is 1000 mm in diameter and weight 300N. 2- The gear (B) pitch diameter is 600mm and weight -250N. 3- The pulley is keyed to the shaft at 400mm to the left of left hand bearing. 4-the distance between bearing C and B is 1250 mm. 5- The power is 20 kW at 750 rpm. 6- Tension ratio T1 / T2-2.5 7- The shaft d.livers power to a gear placed horizontally in front, the pressure angel of gear is 20. 8- The allowable shear stress is 70N / mm, kt-2 and km- 1.5. Determine: the diameter of shaft
- A shaft is fixed at support C and has a torque of 75lb.ft with respect to free end at a distance of 0.75ft from C. It remains constant for 0.75ft before a negative uniformly distributed torque of 1200lb.ft/ft at a distance of 1.5ft is introduced. The shaft then remains flat for 1.5ft to free end with a torque of 600lb.ft. where in the shaft is the torque equals to negative 1200lb.ft measured from the free end?An engine develops 5.0 MW at 115 RPM and the ratio of maximum to mean torques is 1.3 to 1. Calculate the diameter (in mm) of the main shaft coupled direct to the engine to transmit the power 1. а. allowing a stress of 50 MPa and assuming the shaft to be solid. b. Calculate the diameter (in mm) of the main shaft coupled direct to the engine to transmit the power allowing a stress of 50 MPa and assuming the hollow with a bore equal to half the outside diameter. For Solid Shaft:T: = D't For Hollow Shaft:T= 16 16D Tm = P/wA keyed sprocket delivers a torque of 778.8 N-m thru the shaft of 54 mm OD. The key thickness is 1.578 cm and the width is 1.11 cm. Compute the length of the same key. The permissible stress value of 60 MPa for shear and 90 MPa for tension. (Ans: 4.33 cm)
- The diameter of shaft is 45mm. Compare the shear stress in the key to the torque in the shaft. calculate the key size to use for the 15 kW low speed shaft with a speed of 384 rpm. Take bxb = 10mm x 10mm as d = 45mm L = 1.5 cm.Write legibly, provide manual step by step solution, and diagram for below given problem. A 1 in height x 6 in length flat keyed to a 5 inches diameter shaft. Determine the torque in the key if bearing stress allowable is 30 ksi. Ans. 225,000 in-lb3. A motor is connected by a belt to pulley B. T, is the tight-side tensile force equal to 1800 N. The shaft spins at a constant speed, 650 rpm. The power delivered by the motor is 12.6 kW. On pulley A, connected to the load, the slack side of the belt has a tension equal to th of the tight side. b T T, B d shaft Dimensions are as follows: da 200 тm 300 тт | 250 тm |180 тm | 250 тm 26 тm dB dahaft a We analyzed a problem similar to this on Test 01 using static failure theories. Is this strictly correct? Because the shaft is spinning, would not a material particle see a time-varying reversal of the the bending stress as in the R.R. rotating beam test? Would a particle see a reversal of the torsional shear stress? Assume Sut = 370 MPa and Sy = 300 MPa. Ignore Marin factors. Ignore stress concentrations. Ignore direct shear stress (that due to V). Find the safety factors with respect to fatigue and yielding. Be guided by section 6-14 on combined loading.
- Q5: A steel shaft is to transmit a stable torque of 1400 Nm to the steel spur gear through a Type B square end key with the dimensions L=140 mm and b=14 mm. What should be minimum height of the keyto transmit the power safely. The allowable bearing stress is 90 MPa.TORSION A solid steel shaft 4 feet long is stressed to 18 ksi at 18 Hz when twisted through 3 degrees. Use G = 12 x 10^6 psi. DETERMINE: A. Compute the shaft diameter (in inches) B. the torque applied in the shaft (in lb-ft). C. What power (in Horseposer) can be transmitted by the shaft? PROVIDE FBD THANK YOUA hollow shaft has an inner diameter of 0.035 m and an outerdiameter of 0.06 m. Compute for the torque if the shear stress isnot to exceed 120 MPa in Nm.