S - N Curve for Cold Drawn Seamless

[Alexisonsmith]

Hey Does anyone know where I can get the S- N curve for Cold Drawn Seamless on the internet, I do not have the time to contact the manufacturer I need it asap ,

Thanks,

[Alexisonsmith]

Hey Does anyone know where I can get the S- N curve for Cold Drawn Seamless on the internet, I do not have the time to contact the manufacturer I need it asap ,

Thanks,

[exFSAE]

What alloy? What temper?

[Alexisonsmith]

Just normal CDS, it is just to get a rough idea of an anlysis

[exFSAE]

Check your textbooks... mine had some S-N curves I believe.

[Hector]

Your library will have this information.

[vandit]

@ Alexisonsmith, can you be little specific as to which material you are interested in. Cold Drawn Seamless or CDS is a manufacturing process.

in any case, you should google 'Atlas of fatigue curves'(not posting the link, as it sometimes takes time to get approved).

There is a google book version of this and there are thousands of S-N curves. On a quick look in index section 2 will be of your interest.

[Adambomb]

If you dig through the materials tables in Solidworks Simulation I believe they have S-N curves. Otherwise I've normally used textbook values.

[Alexisonsmith]

Thanks that ia great help

[Alexisonsmith]

So I have looked in the Atlas of fatigue curves however there is no S-N curve for CDS steel tubing. Also there is nothing in the solidworks simulation package. Could I just use a mild strength steel to have an idea of the fatigue characteristics?

Alexisonsmith

[fixitmattman]

Of course there isn't going to be a 'S-N curve for CDS tubing.' You need to calculate it yourself using the base material curve, loading conditions, and various other modifying factors. This is a 20 min calculation if you have the shigley text, or any other text with a half decent section on fatigue.

[Alexisonsmith]

So If I use say a medium strength S-N curve and then use the basic loading conditions etc? Could you reccomend a book?

Alexisonsmith

[Demon Of Speed]

"Shigley's Mechanical Engineering Design" page 280-285 or so.

For our control arms (with the loading conditions, material, finish, size, temp, reliability, welding, etc. that we wanted/had) if made from 1018 steel was around 13ksi, and 4130 steel was around 22 ksi, for example. As you can see that is around 0.2-0.3 of the ultimate strength. A rule of thumb for infinite fatigue life is 1/3 of the yield strength.

see h t t p : / / f s a e . c o m /eve/forums/a/tpc/f/125607348/m/509108474?r=610107284#610107284