· l=Im, B=4×105TArea, A=TTY°= 3·14x()=3-14 memf, E=31•4MV=3|·4 x1ŌE= 3•14 X102V.2%3Dw=?

Answered: Image /qna-images/answer/55582c22-ee46-464d-b1f8-a75548fa4b88.jpg

Answered: %3D | bartleby

Engineering

Mechanical Engineering

%3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A hollow shaft with outside diameter of 14 cm and wall thickness of 0.8 cm transmits 400 KW at 400 rpm. What must be the angular deflection if the length is 5 m? G= 12 Mpsi
Mechanical design The maximum load in a rotating shaft is subjected to bending moment of 1 kN.m and a torque of 1 kN.m. The member is made of steel the Ultimate Tensile Strength 440 MPa, Yield Tensile Strength 370 MPa. With a safety factor of 4, kt = km = 1.5 and keyway stress consternation is presented. According to the maximum shear stress theory, the shaft diameter will be: a. 160 mm b. 74 mm C. 145 mm d. 92.5 mm e. 60 mm f. 66 mm
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.
A solid steel shaft 4.5 m long is stressed at 75 MPa when twisted through 4.5°. What power can be transmitted by the shaft at 25 Hz? Use G = 83 GPa.
ɪɴ ᴀ ᴄᴏɴᴠᴇɴᴛɪᴏɴᴀʟ ʀᴇꜰʀɪɢᴇʀᴀᴛɪᴏɴ ᴄʏᴄʟᴇ ᴡʜɪᴄʜ ᴜꜱᴇꜱ ꜰʀᴇᴏɴ-12 ᴀꜱ ᴛʜᴇ ʀᴇꜰʀɪɢᴇʀᴀɴᴛ, ᴛʜᴇ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇᴏꜰ ᴛʜᴇ ᴇᴠᴀᴘᴏʀᴀᴛɪɴɢ ꜰʟᴜɪᴅ ɪꜱ -20°ᴄ. ɪᴛ ʟᴇᴀᴠᴇꜱ ᴛʜᴇ ᴇᴠᴀᴘᴏʀᴀᴛᴏʀ ᴀꜱ ꜱᴀᴛᴜʀᴀᴛᴇᴅ ᴠᴀᴘᴏʀ ᴀᴛ -20°ᴄ ᴀɴᴅ ᴇɴᴛᴇʀꜱ ᴛʜᴇ ᴄᴏᴍᴘʀᴇꜱꜱᴏʀ. ᴛʜᴇ ᴘʀᴇꜱꜱᴜʀᴇ ɪɴ ᴛʜᴇ ᴄᴏɴᴅᴇɴꜱᴇʀ ɪꜱ 1.30 ᴍᴘᴀ. ᴛʜᴇ ʟɪQᴜɪᴅ ʟᴇᴀᴠᴇꜱ ᴛʜᴇ ᴄᴏɴᴅᴇɴꜱᴇʀ ᴀɴᴅ ᴇɴᴛᴇʀꜱ ᴛʜᴇ ᴇxᴘᴀɴꜱɪᴏɴ ᴠᴀʟᴠᴇ ᴀᴛ 40°ᴄ. ɪᴛ ɪꜱ ᴘʀᴏᴘᴏꜱᴇᴅ ᴛᴏ ᴍᴏᴅɪꜰʏ ᴛʜɪꜱ ᴄʏᴄʟᴇ ʙʏ ᴀᴅᴅɪɴɢ ᴀ ʜᴇᴀᴛ ᴇxᴄʜᴀɴɢᴇʀ ᴛʜᴀᴛ ᴡᴏᴜʟᴅ ꜱᴜᴘᴇʀʜᴇᴀᴛ ᴛʜᴇ ꜱᴜᴄᴛɪᴏɴ ᴠᴀᴘᴏʀ ᴛᴏ 25°ᴄ.Required:-ᴄᴏᴍᴘᴀʀᴇ ᴛʜᴇ ᴄᴏᴇꜰꜰɪᴄɪᴇɴᴛ ᴏꜰ ᴘᴇʀꜰᴏʀᴍᴀɴᴄᴇ ᴏꜰ ᴛʜᴇꜱᴇ ᴛᴡᴏ ᴄʏᴄʟᴇꜱ.-ᴡʜᴀᴛ ɪꜱ ᴛʜᴇ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴏꜰ ᴛʜᴇ ʀᴇꜰʀɪɢᴇʀᴀɴᴛ ᴇɴᴛᴇʀɪɴɢ ᴛʜᴇ ᴇxᴘᴀɴꜱɪᴏɴ ᴠᴀʟᴠᴇ ᴡɪᴛʜ ᴛʜᴇ ʜᴇᴀᴛᴇxᴄʜᴀɴɢᴇʀ?-ꜰᴏʀ ᴀ ʟᴏᴀᴅ ᴏꜰ 50 ᴋᴡ, ᴅᴇᴛᴇʀᴍɪɴᴇ ᴛʜᴇ ᴠᴏʟᴜᴍᴇ ꜰʟᴏᴡ ʀᴀᴛᴇ ꜰᴏʀ ʙᴏᴛʜ ᴄʏᴄʟᴇꜱ.
A pulley is keyed to a shaft midway between two anti-friction bearings. The bending moment at the pulley varies from – 170 N-m to + 510 N-m.The shaft is made of cold drawn steel having an ultimate strength of 540 MPa and yield strength of 400 MPa, Take σe = 0.5 σu. Determine the required diameter for an indefinite life based on Goodman equation. The actual stress concentration factor for the keyway is 1.6. The factor of safety is 1.5. Take size factor = 0.85 and surface finish factor = 0.88.
The material is a spring wire has a shear modulus of 1.2 x 107 lbf/in2. The maximum allowable stress under design conditions is 50,000 lbf/in2. The spring index is 7. Assume the maximum stress is experienced when a 700 lbm objects falls from a height of 46 in above the tip of the spring, impacts squarely on the spring, and deflects the spring 10 in. Determie: 1. The minimum wire diameter is most nearly A. 0.58 in B. 0.88 in C. 1.4 in D. 1.8 in 2. The mean coil diameter is most nearly A. 8.6 in B. 10 in C. 13 in D. 16 in 3. The number of active coils is most nearly A. 8 B. 11 C. 12 D. 14
A 4-T crane is used to lift a 3m x 1.2m x 200mm pre-cst panel. A preader beam is needed to ensure the proper distribution of load in the lifting chains. Consider modulus of elasticity, E=200,000 MPa, allowable shearing stress of lifting pin is 50 MPa, the steel plate used in the spreader beam has an allowable bearing stress of 40 MPa. (All measurement in the figure is in millimeters) 1. Determine the total load in kN, the crane has to carry the the lifting accessories (spreader beam, lifting chains and hooks) has a total mass of 720 kgs. if 2. Determine the average normal stress on each leg of the lifting chain A and B. 3. Determine the required diameter (d) in millimeters of the lifting pin if the allowable shearing stress must not be exceeded (Round to the nearest whole number). 4. Determine the required thickness (t) in millimeters of the steel plate to be used if the allowable bearing stress must not be exceeded. (Round to the neareat whole number)
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If the design limit of a 1.5m x 2 m rectangular support beam with a safety factor 5 is 100 x 106 N/m2. (a) What is the maximum strain the beam may experience without failure? (b) At the design limit the beam is compressed 1.15 cm, what is the original length of the beam? (young's modulus = 20 x 109)
The material is a spring wire has a shear modulus of 1.2 x 107 lbf/in2. The maximum allowable stress under design conditions is 50,000 lbf/in2. The spring index is 7. Assume the maximum stress is experienced when a 700 lbm object falls from a height of 46 in above the tip of the spring, impacts squarely on the spring, and deflects the spring 10 in. Determie:1. The minimum wire diameter is most nearlyA. 0.58 in B. 0.88 in C. 1.4 in D. 1.8 in2. The mean coil diameter is most nearlyA. 8.6 in B. 10 in C. 13 in D. 16 in3. The number of active coils is most nearlyA. 8 B. 11 C. 12 D. 14
2. What is the tensile load of a 1/2 in x 4 in x 12ft steel tie rod experiences an 80°F temperature decrease from the no - stress temperature? E=30x10^6 psi, a=6.5x10^-5/°F