I have a requirement to relate SN curves for a material that has been tested with a R-ratio of 0.1 to my specific requirements which involve r-ratio 0f around 0.8.
Does anyone know of a mathematical correction method that could be applied to the original data curve.
I am trying to avoid time...
metengr,
Thanks for the advice, The butt welds are indeed full penetration and the tubes shall be subjected to internal pressure and temperatures above ambient (this is the reason for the fatigue tests, we are validating an SN curve)
Your points on uniaxial tension are well received and back...
The application shall subject the tube to both tension and bending over a sustained period with bending stress being by far the dominant feature.
My question I guess is if the test is only tension will the strain applied be uniform in the sample including at the welds.
Can anyone please advise,
I have a requirement to perform fatigue testing on some Super duplex tubes which contain butt welds in the centre.
Strain has to applied in the weld area.
Resonant frequency testing has been specified which is fine but very expensive.
An alternative suggestion for a...
