I am using ALE adaptive mesh domain option in a highly deformed forming problem(spinning process) and I want to know how it affect my results? without it analysis become interrupted with an excessively distorted elements error.
Any help would really be appreciated.
Since you talking about an adaptive meshing, i think you should check if the point of measurement is one of the mesh grid and is not getting changed at each time step (in Dynamic Analysis)
Good luck.
I think your question already contains the answer, if you want to simulate large material deformations a standard mesh normally will be highly distorted and you should remesh the geometry between the deformation steps to avoid large errors. The ALE domain option will affect your results in the way that your problem will be solvable and the results show a more realistic behaviour.
Have a nice day
Thanks for your answer dear Omar,
But could you explain more? I do not get your point clearly.
I want to measure the reaction forces at Reference point of two rigid body, and since they are rigid there are not undergone any change throw the steps. an Image of my model has been attached to help you get the problem easily. Green circles are rigid body and they have some reference points, where the reaction forces are going to be calculated. and central circle is my deformable body and has been assigned ALE adaptive meshing.
Thanks for your time.
Dear Allan,
I know that ALE domain mesh option renew my model mesh in specified frequency and make the problem solvable. My concern is to know how this renewing of mesh affect my final result( like strains, stresses, reaction fores and much more important deformed shape of model). You know one of the aims of simulation is to find out weather your process provide the final desired shape or not. And I am worried lest remeshing misleads me in deciding on weather analysis provide desired deformed shape for me or not.
Thank you.
One of the issues with mesh in FEA is that after several time steps, the mesh might distort and its aspect ratio becomes too big or too small or even a negative Jacoobian might arise. These are bad news for FEA and as a result, the problem does not converge.
Adaptive meshing can prevent or minimize a range of problems including the above.
It is more than just changing the results.
Hi Bahram;
In my point of view i suggested to check your 'Reference points' positions ... if they are not changing their positions at each time step. And it seems ok !
Now, in your model did you define a Friction contact between the rigid bodies and the deformable body.
Good luck.
Adaptive meshing would not affect results normally. Results usually depend on density of reporting/displaying data as long as the aspect ratio and the like are satisfied.
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