Accurate calculation of a stress gradient
Accurate calculation of a stress gradient
(OP)
Hello,
I am trying to calculate a stress gradient within a 2-D structure as accurately as possible. I have compared results in a simple example where the analytical solution is known (infinite plate with a hole).
I thought that the finer the mesh, the more accurate the result. But in fact I encountered some problems because of the extrem refinement (stress results are not good around the hole). I used a scaled model but the same problem occured. Thus it seems that a too fine model is not a good solution.
Does somebody have a good method or good advices in order to calculate this stress gradient.
Please feel free to ask if you want some detail about my case.
Thank you.





RE: Accurate calculation of a stress gradient
corus
RE: Accurate calculation of a stress gradient
Well, how can I post pictures on this forum ?
vpub.
RE: Accurate calculation of a stress gradient
corus
RE: Accurate calculation of a stress gradient
That can be found now at http://www.geocities.com/vlebaube/gradient.html
vpub.
RE: Accurate calculation of a stress gradient
RE: Accurate calculation of a stress gradient
corus
RE: Accurate calculation of a stress gradient
What you both are saying is right. But the problem I have is not to get the exact stress values but to get the value of the stress gradient as good as possible. And here when the mesh is too fine it does not allow to have a good precision (probably due to numerical problems). So I was asking if somebody knows another method or a solution from a "normal" mesh in order to calculate this gradient.