FEA model for VALVE body
FEA model for VALVE body
(OP)
Dear all,
I meet a problem, when we do the FEA for a vlave body, we found it needs a minimum material condition model.How to understand it?Does it is the same as the ASME b14.5 LMC(least material condition)?
In advance to thank you for all of your answers.
I meet a problem, when we do the FEA for a vlave body, we found it needs a minimum material condition model.How to understand it?Does it is the same as the ASME b14.5 LMC(least material condition)?
In advance to thank you for all of your answers.
What's your plan, How to do, What do you receive after review.





RE: FEA model for VALVE body
This means the FEA model is defined by the smallest/thinnest dimensions allowable per the drawing tolerances. I.e. if the drawing specifies a wall thickness of 10mm +/- 1mm, you would model the wall thickness at the worst-case, weakest condition allowed, or 9mm.
RE: FEA model for VALVE body
Should I make the model by the notification or the tolerances of the dimensions?
What's your plan, How to do, What do you receive after review.
RE: FEA model for VALVE body
RE: FEA model for VALVE body
Then the tolerance on the wall thickness, per the drawing, is .15 to .30 inches. Make the model at the minimum allowable thickness, or .15 inches. That is what I said, regardless of how you interpreted it.
Note that other dimensions than just the wall thickness may affect the valve strength, and it's up to the engineer to figure out what those may be. In other words, you may want to investigate other parameters that are allowed to vary per the drawing, in order to determine what the real worst case (lowest strength) configuration is.
I hope, given your apparent knowledge of the subject, that somebody is going to overlook/review your efforts?
RE: FEA model for VALVE body
When I use btrueblood's method, how to deal with the problem that the wall thickness is less than the allowable dimension?
For example, we model a pipe, the OD=18, th ID=10, so the minimum wall thickness is 4, but on the drawing, the allowable wall thickness is 3, what should I do , to change the ID, or change the OD, or anything?
Thanks a lot
What's your plan, How to do, What do you receive after review.
RE: FEA model for VALVE body