Practice Problems P2) A steel cylindrical rod 50 mm in diameter and 2.5 m long is subjected to a pull of 100 kN. To what length the bar should be bored centrally so that the total extension will increase by 15 % under the same pull, the bore being 25 mm in diameter. Take E = 200 GN/m2. Length of boring = 1.12 m %3D
Practice Problems P2) A steel cylindrical rod 50 mm in diameter and 2.5 m long is subjected to a pull of 100 kN. To what length the bar should be bored centrally so that the total extension will increase by 15 % under the same pull, the bore being 25 mm in diameter. Take E = 200 GN/m2. Length of boring = 1.12 m %3D
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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1)In this , how did you multiply by 1.15 ..like from where did it come ?
2)Also pi/4( 0.052-0.0252) from where did 0.052 and 0.0252 come ...I didn't understand.
3)Also the equation which you formed , sigma ( 2.5-x)/E + sigma b ×x/E ..please explain how you formed this equation .
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