Dear all.

I would like to know if someone have the S-N curves for FRP pipes. I'm using UKOOA code.
Can anybody help-me?
Thanks...

Hi Luciano,

I can't find also a fatigue curve for FRP Pipe. As a simple estimate you can use the fatigue curve for PD5500 and using the modulus of Elasticity of the FRP in the formula given in that Code you can have an S-N Curve. Also you can use a Finite Element Program (FE-Pipe, Ansys,etc...) to get the Peak Stresses at Tees, Bends using the material properties, geometries of FRP and calculate the SIF's to be applied to your Beam Element Program such as Caesar.

A correction in my interpretation is most welcome.

Hope this helps,
Cheers!!!