Stress Life - Strain Life Fatigue Query 1

[morris9791]

Dear Experts,

We have experimentally tested fatigue data of cast steel notched and unnotched dumbell specimens to which there is a stress life curve.
Is this stress life curve suitable for stress above yield of the material as we have determined from our FEA?

I realise strain life curve would be more suitable since it accounts for local plasticity, this is data we do not have.

Thanks

 

[unclesyd]

You might want to checkout this site.

https://www.efatigue.com/

 

[davefitz]

unclesyd:

a star to you. The contributors to that link include Downing & Socie- their papers were the basis of my work in the 90's on boiler stress analyzers that use the rainflow cycle counting theorem. I'll see if they have a seminar near to where I expect to be in the next 6 mos.