12. A cylindrical steel bar (1045 steel) is subjected to repeated tension-compression stress cycling along its axis. If the load amplitude is 20 kN, calculate the minimum allowable bar radius to avoid fatigue failure. Use a safety factor of 2.5 and use the below figure for the fatigue limit stress. Round answer to two significant figures. Stress amplitude, S (MPa) 500 400 300 200 100 10³ 104 105 1045 steel 2014-T6 aluminum alloy Red brass 10 107 10" Cycles to failure, N 10 T 70 60 50 40 30 20 10 0 1010 Stress amplitude (10 psi)

12. A cylindrical steel bar (1045 steel) is subjected to repeated tension-compression stress cycling along its axis. If the load amplitude is 20 kN, calculate the minimum allowable bar radius to avoid fatigue failure. Use a safety factor of 2.5 and use the below figure for the fatigue limit stress. Round answer to two significant figures. Stress amplitude, S (MPa) 500 400 300 200 100 10³ 104 105 1045 steel 2014-T6 aluminum alloy Red brass 10 107 10" Cycles to failure, N 10 T 70 60 50 40 30 20 10 0 1010 Stress amplitude (10 psi)

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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Q4 Beta =111 Please provide justified answer asap to get a upvote
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Displacement with elemental stiffness method, the rest the same.