Hi,
I'm trying to run a fatigue study using alloy 356 T6 as a material.
I've had no luck tracking down an SN curve but Solidworks allows deriving the SN curve automatically based on ASME SN curves and the moduli of elasticity based on ASME Carbon Steel curves or Austentic Steel curves.
So my question is: will the curve derived be of any use as it is based on steel and my material is aluminium?
Thanks in advance
Hi Janko,
thank you very much for your help.
Could you expand on the phrase 'E-mod off'?
Thanks in advance
Alan
Thank you James.
Hello,
The answer is no, you shouldn't.
Please refer to Solution S-069698 from the SOLIDWORKS Knowledge Base.
Excerpt: "The "Derive from material Elastic Modulus" option is ONLY valid for the fatigue validation (according to the ASME code) of BOILERS AND PRESSURE VESSELS made of material approved by the ASME CODE for such use."
Julien BOISSAT
Expert, Technical Customer Support - SOLIDWORKS Simulation
3DS.COM/SOLIDWORKS
Dassault Systèmes
Thank you Julien, it's good to get a definite answer for future reference.
Do you know that particular ASME code. I need to use that as a reference in my project.
Hi Alan,
According to SW Help:
The SN curve is derived by dividing each stress value of the reference SN curve by the modulus of elasticity of the reference ASME material and multiplying it by the modulus of elasticity of the current material. The associated numbers of cycles remain unchanged.
I would try to compare it to a Aluminum material that you know a SN curve and E-mod off. It will answer your question.
Janko Stellaard
Cadmes BV
The Netherlands