Question

In a bolted assembly, the bolt is subjected to a preload of 15 kN. The assembly is subjected to force which varies from 0 - 12 kN. The stiffness of the parts joined is 2 times stiffness of the bolt. Determine the size of the bolt assuming fine threads. Following data is given for the bolts: $S_{ut}$ = 700 MPa, $S_{yt}$ = 500 MPa, E = 207 GPa. Endurance limit in bending = 200 MPa, fatique stress concentration factor = 2.4, f.o.s. = 2 and expected reliability is 95%. Also find the factor of safety considering Gerber criterion.

          In a bolted assembly, the bolt is subjected to a preload of 15 kN. The assembly is subjected
to force which varies from 0 - 12 kN. The stiffness of the parts joined is 2 times stiffness of
the bolt.
Determine the size of the bolt assuming fine threads. Following data is given for the bolts:
$S_{ut}$ = 700 MPa, $S_{yt}$ = 500 MPa, E = 207 GPa. Endurance limit in bending = 200 MPa,
fatique stress concentration factor = 2.4, f.o.s. = 2 and expected reliability is 95%.
Also find the factor of safety considering Gerber criterion.

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In a bolted assembly, the bolt is subjected to a preload of 15 kN. The assembly is subjected
to force which varies from 0 - 12 kN. The stiffness of the parts joined is 2 times stiffness of
the bolt.
Determine the size of the bolt assuming fine threads. Following data is given for the bolts:
Sut = 700 MPa, Syt = 500 MPa, E = 207 GPa. Endurance limit in bending = 200 MPa,
fatique stress concentration factor = 2.4, f.o.s. = 2 and expected reliability is 95%.
Also find the factor of safety considering Gerber criterion.

Added by Santiago J.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Supreeta N

09/06/2023

Step 1

Given that the preload on the bolt is 15 kN and the force varies from 0 to 12 kN, the maximum force applied to the bolt would be the sum of the preload and the maximum force, which is 15 kN + 12 kN = 27 kN. Show more…

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In a bolted assembly, the bolt is subjected to a preload of 15kN. The assembly is subjected to force which varies from 0-12kN. The stiffness of the parts joined is 2 times stiffness of the bolt. Determine the size of the bolt assuming fine threads. Following data is given for the bolts: S_(ut)=700MPa,S_(yt)=500MPa,E=207GPa. Endurance limit in bending =200MPa, fatigue stress concentration factor =2.4, f.o.s. =2 and expected reliability is 95%. Also find the factor of safety considering Gerber criterion. In a bolted assembly,the bolt is subjected to a preload of 15 kN. The assembly is subjected to force which varies from 0 - 12 kN. The stiffness of the parts joined is 2 times stiffness of the bolt. 7 Determine the size of the bolt assuming fine threads. Following data is given for the bolts: Sut = 700 MPa, Syt = 500 MPa, E = 207 GPa. Endurance limit in bending = 200 MPa, fatigue stress concentration factor = 2.4, f.o.s. = 2 and expected reliability is 95 % . Also find the factor of safety considering Gerber criterion.

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