Calculate Fatigue Life of Custom Bolt

[araanandv2]

Hi All,

We have manufactured a custom bolt (similar to standard bolt).
Now we need to calculate the fatigue life of the bolt.
Could you please guide me in calculating the fatigue life?

Thanks,

Ana

 

[stewartcs]

Hi All,

We have manufactured a custom bolt (similar to standard bolt).
Now we need to calculate the fatigue life of the bolt.
Could you please guide me in calculating the fatigue life?

Thanks,

Ana

What type of loading?

CS

 

[Mech_Engineer]

Basically, you'll need to know what the loading conditions are, what material the bolt is made out of, and the stress concentrations in the bolt. As long as you used a well-known material, you should be able to find an S-n diagram for it; but it will be up to you to figure out where the bolt will fail and under what conditions.

 

[FredGarvin]

There are standards for doing such tests. I would suggest a look through ASTM's specs.

It will also drastically depend on material, heat treat and what you have made custom in the design.

 

[araanandv2]

Thank you.

I need to do Hand calculation.
The axial load on the bolt is around 2000 pounds.
The shank dia of the bolt is .1250".

Thanks,

Ana