Parametric study meshing strategy
Parametric study meshing strategy
(OP)
Hi all,
I would like to discuss about the importance of meshing in parametric studies, I know that the mesh strategy has the utmost importance in producing good results, however, how important is it for parametric studies (especially ones which are non-dimensional, i.e. results are presented as a comparative study)? Anyone have any experience or advice on this they would like to share.
Thanks
I would like to discuss about the importance of meshing in parametric studies, I know that the mesh strategy has the utmost importance in producing good results, however, how important is it for parametric studies (especially ones which are non-dimensional, i.e. results are presented as a comparative study)? Anyone have any experience or advice on this they would like to share.
Thanks





RE: Parametric study meshing strategy
if you're just doing patch tests and want to see how the element behaves, then it probably doesn't matter.
if you're comparing different materials, then it's important, as you need to know the maximum stress.
RE: Parametric study meshing strategy
Thanks again.
RE: Parametric study meshing strategy
so you want to know your model has converged.
i don't think you need to use the same mesh density for both models. and there are several ways to define mesh density ... absolute element size, element size/critical dimension, ... i think all you need to say is "this is the peak stress in the baseline model, and this is the peak stress in the modeified model"
RE: Parametric study meshing strategy
There are also general guidelines to follow for stress/strain models: 3-5 elements through the thickness of a thin section, 5-10 elements around a radius, etc.
At the end of the day, you may want to refine the mesh on your optimized shape to see if the stress results change any. That will give you confidence that the solution is grid-independent.
RE: Parametric study meshing strategy
I would be careful of over refining a mesh though, as stress singularities could significantly skew your results (i.e sharp corners, at application point of a point load, at regions of contact between two bodies, etc.).
Alternatively, there a are several resources available to aid you in your analysis based on the presence of common geometric features such as ESDU datasheets and textbooks (Roarks for example).
Best of luck...
RE: Parametric study meshing strategy
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