كعود Design a long pole (diameters of hollow cross section, length) made of AISI 1020 CD steel capable of carrying a 600 kg electrical transformer. Then calculate the design safety factor.
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- Q2 Design a long pole (diameters of hollow cross section, length) made of AISI 1020 CD steel capable of carrying a 600 kg electrical transformer. Then calculate the design safety factor.Condition #1: A structural support for a machine is subjected to a static compression load of 20 kN. The manufactured from a circular rod made from SAE 1040 Hot Rolled steel. Specify suitable diameter for the cross section of the rod based on the basic size. Steel data are available in Table A-10 from the textbook. support is A-10 Typical properties of carbon and alloy stcels. Ultimate strength, s Yield strength, s, Percent Material SAE no. Condition ksi MPa ksi MPa elongation 1020 Annealed Hot rolled 57 393 43 296 36 1020 65 448 48 331 441 36 1020 Cold drawn 75 517 64 20 1040 Annealed Hot rolled Cold drawn 75 517 51 352 30 BO40 90 621 60 82 414 1040 97 669 565 16 1040 WQT 700 WQT 900 WQT 1100 WQT 1300 127 118 876 93 641 19 1040 814 90 621 1040 107 738 80 552 24 1040 87 600 63 434 32 1080 Annealed OQT 700 OQT 900 OQT 1100 OQT 1300 89 614 1303 1234 1080 54 372 25 189 179 145 117 141 129 972 889 710 1080 12 1O80 13 1000 103 70 17 23 1080 807 483 1141 Annealed 87 600 772 1141 51 352 26…A helical spring made of oil hardened and tempered steel compression springs, made of circular wire, is subjected to an axial force, which varies from (2.5 KN) to (3.5 KN). Over this range of force, the deflection of the spring should be approximately (5 mm). The spring index can be taken as (5). The spring has square and ground ends. If ultimate tensile strength of (1050 N/mm2) and modulus of rigidity of (81370 N/mm2). The permissible shear stress for the spring wire should be taken as (50 %) of the ultimate tensile strength.Design the spring and calculate the following: 1. Wire diameter; 2. Mean coil diameter; 3. Number of active coils; 4. Total number of coils; 5. Solid length of the spring; 6. Free length of the spring: 7. pitch of coils (p); 8. Required spring rate; 9. Actual spring rate; and 10. Draw a neat sketch .of the spring showing various dimensions
- 1. A piston rod, made of AISI 3140 steel, OQT 1000 F, is subjected to a repeated, reversed load. The rod is for a 20-in. air compressor, where the maximum pressure is 125 psig. Compute the diameter of the rod using a design factor based on: (a) ultimate strength, 1.62 in 1 5/8 in (b) yield strength. 1.23 in = 1 % in For AISI 3140 steel, OQT 1000 F Su = 152 5. ksi Nu = 8 Sy = 132 5. ksi Ny = 4TORSION 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 YOUQ12/ An electric motor drive an exhaust fan through an open belt drive. Following data are provided: Motor Pulley Fan Pulley Diameter (mm) 400 1600 Angle of contact (radians) 2.5 Coefficient of friction 0.3 Speed (rpm) Power transmitted (kW) 700 22.5 Calculate the width of 5 mm thick flat belt. Take permissible stress for the belt material as 2.3 MPa, and assuming the density of the belt is 1000 kg/m³.
- Starting with a spring index of C = 10, design a compression coil spring of 302 stainless wire with squared ends. The spring deflects 50 mm when a force of 90 N is applied and closes to solid when ys is 60 mm. At closure, use a design factor of 1.2 guarding against yielding. Select the smallest diameter wire where wire diameters are available in 0.2-mm increments between 0.2 and 3.2 mm. For the design, specify the wire diameter, the inside and outside diameters of the coil, the spring rate, the total number of coils, the free length of the spring, the final factor of safety, and stability conditions.The width of the belt used if its thickness is 6 mm. Ans. 261 mm 8. A nylon-core flat belt has an elastomer envelop; is 200 mm wide, and transmits 60 KW at a belt speed of 25 m/s. The belt has a mass of 2 kg/m of the belt length. The belt is used in a crossed configuration to connect a 300 mm diameter driving pulley to a 900 mm diameter driven pulley at a shaft spacing of 6 m. A. Calculate the belt length and the angles of wrap. Ans. 13.95 m, 3.34 rad or 191.4° B. Compute the belt tensions based on a coefficient of friction of 0.33. Ans. 1.76 KN, 1.96 KNProblem 11. The problem below, consists of a rod with a circular cross-section embedded and bonded in a wall and subjected to a load of P at the left end. We will assume that the rod and the wall act as linear elastic materials. Furthermore, we can replace the wall with linear springs distributed over the surface of the rod and having a spring stiffness k (units force/length'). (a) Formulate the problem to solve for the axial displacement as a function of position. (b) Sketch how the axial force diagram might change as k goes from a low value to a high value compared to E. 6.
- Compute the design factor in the middle portion only of the rod AC if the steady vertical force on the boom is 2500 lb. The rod is rectangular, 1.50 in by 3.50 in, and is made from SAE 1144 cold-drawn steel. Include a mohr circle.MACHINE DESIGN TOPIC A short compression member with Do = 2Di is tosupport a dead load of 25 tons. The material isto be 4130 steel, WQT 1100 F. Calculate theoutside and inside diameters in terms of incheson the basis of (a) yield strength, (b) ultimatestrength.*For 4130 steel, WQT 1100 FSu = 127 ksiSy = 114 ksi*Use the following Safety FactorsNu = 4Ny = 21) A shaft, mounted in bearings at A and D, holds pulleys at B and C. All forces shown represent belt pulls. The shaft is made from ASTM grade 25 cast iron (Sur-26 kpsi, Suc-97 kpsi). The application requires a safety factor of SF=2.8. What diameter should be used for the shaft? [Remember, cast iron is a brittle material and brittle materials use Modified Mohr Theory] 300 lb 6" D. 50 lb fe 8" D. 27 lb 360 lb D 7" 6°