Q- The required diameter for a solid shaft is 100 mm to transmit 200kw at 135pm, with the working shear Stress mot to exceed -MPC.
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- Score on last try: 0 of 1 pts. See Details for more. You can retry this question below of Do A drive shaft is made of a hollow tube with an outer diameter 2.5 in. It is desired to transmit 9.5 hp at 24 rpm. The allowable shear stress in Tallow = 18 ksi. What is the inner diameter of the tube D; to the nearest 1/8 in. = Do Di The inner diameter is D; mixed number. in. = cc 130 BY NO SA 2021 Cathy Zupke 2.15 X not a validA Hollow power transmission shaft of length ‘L’ 1103 mm, outer diameter ‘D’ 73mm and inner diameter 'd' 50. is required to transmit a power of P 60kW at a speed of 2950rpm. The modulus of rigidity of hardened carbon steel, which the shaft is made of, is 79.5 GPa Calculate the maximum shear stress in the shaft material?o ; jith it. The external dig,, === 10.20. A shaft has a number of a collars integral with ey, the collars is 00 and rhef:}mfl diemater is 250 mm. If the intensity of pressure is (.35, 1) and the coefficient of friction is 0.05, estimate : 1. power absorbed when the shu; SPEBm. carrying q load of 150 kN« and 2, mamber of collars required. «d —ann AN e - g
- A) A shat of diameter of d= 35 mm is subjected to a torque varying between 100 N.m to 500 N.m. The SCF due to keyway is 1.5, Su = 500 MPa, S', = 200 MPa. Correction factor for torsion=0.6. Surface finish factor=0.85 and size factor=0.82. Find the value of fatigue factor of safety F.S. Is the design of the shaft safe or not? And why?Q1: Design and draw a cast iron flange coupling for a mild steel shaft transmitting 80 kW at 220 rpm with the following specifications: Allowable shear stress in the shaft = 400 MPa Permissible angle of twist < 1° in a length of 20 diameters Allowable shear stress in the coupling bolts 30 MPa Rigidity modulus of shaft materials = 85 GPa Allowable shear stress for hub material = 15 MPa You may adopt, width of key = 25 mm, thickness of key = 14 mm You may also consider that the shaft and key are made of the same material. Four number of bolts are to be used in the coupling. Find out the diameter of the shaft required and main dimensions of the flanges and the key. Adopt suitable dimensions. Draw a neat sketch for the flange coupling with the designed dimensions.3) A flange coupling is to connect two 60mm shafts. The hubs of the coupling are 120mm, 100mm thick, & the flange webs are 20 mm thick. Six M16 bolts fasten the flange from a 165 bolt circle. The keyway is 15mm shorter than the hub’s thickness & the key is 15mm x 15mm. The coupling transmits 45kW @ 450rpm. The yield point in shear for all materials is half of its yield point in tension or compression. Yield tensile strength is 0.75 of ultimate strength of the materials. The Sult is 448N/mm2 . Find: (a) the shear stress in key; (b) the bearing stress in key; (c) the shear stress in bolts; (d) bearing stress in flange.
- J:41) A motor delivering 3000 kW at 20 Hz to a partially hollow steel shaft (GSt=80 GPa) connected through gearing to an aluminum shaft (GAl=30 GPa) spinning a generator. The maximum shear stress in the aluminum shaft and the total angle of twist from motor to generator is: TmaxAI=6.75MPa, &tot=2.66x10^-3 radians WHY? SHOW WORK! WILL RATEQ1) A double square threads power screw has a major diameter of 1.5 in. and a pitch of 3/16 in. The system coefficients are, f =0.95 and f.= 0.08. The other availables date are: dc = 1.8 in, and F = 1450 Ibf per screw. Find: a) The torque required to raise and lower the load and the efficiency. b) The body stresses, torsional and compressive. c) The bearing stress. d) The thread stresses bending at the root, shear at the root, and maximum shear stress at the same locationA propeller drive shaft on a ship is to transmit 2500 Hp at 75rpm. It is made of AISI 1040 WQT 1300 steel. Use a design factor of 6 based on the yield strength in shear for the solid shaft.
- Design a muff coupling to connect two shafts transmitting a 40kW at 120r.p.m. The permissible shear and crushing stress for shaft and key material are 30MPA and 80MPA respectively. The material of muff is cast iron with permissible shear stress 15MPA. Assume the maximum torque transmitted is 25% greater than the mean torque.A 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)1) A shaft is loaded in bending and torsion such that Ma = 70 N-m, Ta = 45 N-m, Mm = 55 N-m, and Tm = 35 N-m. For the shaft, Sut = 700 MPa and Sy = 560 MPa. A fully corrected Se = 210 MPa is assumed. Let K; = 2.2 and Kfs = 1.8. With a design safety factor of 2.0, determine the minimum acceptable diameter of the shaft using: a. DE-Modified Goodman criterion b. DE-ASME Elliptic criterion C. DE-Gerber criterion