The assembly shown below with M8x1.25 bolt/nut is subjected to an oscillating force F that changes between 0 and Fmax. Obtain the Fmax (in kN) with a saftey factor of 3, such that the amplitude of the alternating stress on the threaded section of the bolt does not exceed 46 MPa. Assume that the bolt and nut were preloaded sufficiently. The stiffness of the clamped material is evaluated as 963 MN/m and the stiffness of the bolt is calculated as 334 MN/m.
The assembly shown below with M8x1.25 bolt/nut is subjected to an oscillating force F that changes between 0 and Fmax. Obtain the Fmax (in kN) with a saftey factor of 3, such that the amplitude of the alternating stress on the threaded section of the bolt does not exceed 46 MPa. Assume that the bolt and nut were preloaded sufficiently. The stiffness of the clamped material is evaluated as 963 MN/m and the stiffness of the bolt is calculated as 334 MN/m.
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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Transcribed Image Text:The assembly shown below with M8x1.25 bolt/nut is subjected to an oscillating force F that changes between 0 and Fmax. Obtain the Fmax (in kN) with a saftey
factor of 3, such that the amplitude of the alternating stress on the threaded section of the bolt does not exceed 46 MPa. Assume that the bolt and nut were
preloaded sufficiently.
The stiffness of the clamped material is evaluated as 963 MN/m and the stiffness of the bolt is calculated as 334 MN/m.
A F
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Hi,
The answer is suppose to be 4.36 KN. The picture attached is a hint to the answer according to my professor.
Transcribed Image Text:Fatigue Loading
What happens if the preload is lost?
Force
wwwwW
ΔF
AF,
Fi
2A
P max
Bolt
P
Fi
Fi
Deformation
kp
EL200
F; + CP
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