Fatigue analysis of materials - when stress above yield
Fatigue analysis of materials - when stress above yield
(OP)
Dear Experts,
We have certain design criteria that certain components must adhere to e.g. No structural failure and some small localised yielding acceptable, other components no yielding allowed etc.
When it comes to fatigue however, if one comes across some localised yielding, can this be acceptable in fatigue analysis or must all stresses be below yield before even considering such an analysis?
We use the strain life approach which I understand accounts for local plasticity (Neuber method).
Thanks
Ed
We have certain design criteria that certain components must adhere to e.g. No structural failure and some small localised yielding acceptable, other components no yielding allowed etc.
When it comes to fatigue however, if one comes across some localised yielding, can this be acceptable in fatigue analysis or must all stresses be below yield before even considering such an analysis?
We use the strain life approach which I understand accounts for local plasticity (Neuber method).
Thanks
Ed





RE: Fatigue analysis of materials - when stress above yield
RE: Fatigue analysis of materials - when stress above yield
corus
RE: Fatigue analysis of materials - when stress above yield
That I understood, I just wanted some backup and ease of mind
Cheers
Steady Eddie
RE: Fatigue analysis of materials - when stress above yield
We use the strain life approach which I understand accounts for local plasticity (Neuber method).
What are you asking? In the first sentence you seem unsure about how to approach high stress yielding, and yet in the second you say you use strain-based fatigue based on Neuber corrections.
What's the question?
RE: Fatigue analysis of materials - when stress above yield
RE: Fatigue analysis of materials - when stress above yield
I was just a little unsure in the back of my mind despite what the strain life approach was telling me
Thanks for your responses guys,
Much appreciated.
best Regards
Steady Eddie