piastra densely forata

[Enr1co]

Hello everyone, I am new to the forum (and generally to forums), but above all I am quite new to solidwork and fem simulations. I ask you for advice

I want to study the bending of a plate subject to a vertical load. the plate is 500x600 mm and inside there is a smaller area 440x530 entirely drilled very narrow (>50000 holes), the load is distributed on a part of the perforated surface.

Now, what I want to get is not a thorough study of the plate deformation mechanism, but a result (simplified) that can be compared with the actual data taken from the plate.

I tell you what I did:

1) as a first attempt I left the uniform plate (without holes) and applied a greater load than the nominal one consistent with the fact that the actual surface on which it is applied is greater than the case with the holes. (Is it wrong? )

the result was that in the loading area the deformation was consistent, but in its propagation in the rest of the plate the deformation was less.(which in fact is reasonable)

2) subsequently,(always without holes) I tried to decrease the thickness of the plate in the perforated area so as to maintain the same volume of material that in the real case (is it wrong? )

Overall the result gave me a deformation of 20% less than I expected

solution 3) I tried to increase the scale of the holes keeping unchanged the full vacuum ratio of the perforated area... from 50000 to a 50 bigger holes (is it wrong? )

bad results...(but I have to better control simulation)

4) I was thinking of using a more yielding material for the perforated area...but how much I don't know ( decreasing the elastic module or bending resistance in a linear way seems a little excessive)

This is the point where I arrived, someone has some constructive advice/critical to give me?thank you to all however for reading here! !

 

[cacciatorino]

Hello everyone, I am new to the forum (and generally to forums), but above all I am quite new to solidwork and fem simulations. I ask you for advice

But what do you need to do simulation of a process already known? do you want to interpolate on similar future geometries but not really existing?

I guess none of your assumptions are realistic, I think if you want to study a perforated plate, you need to study a perforated plate. what you can do to simplify the model is to use shell elements instead of solid and exploit symmetry conditions (probably you will be able to work with 1/4 of the real plate).


Unfortunately, your problem is extremely complex and you'll need a system with a huge number of knots. There are systems of "sub-modelling" to study similar cases, but I am not experienced.

 

[Enr1co]

hello hunter, first of all thank you very much for your answer.

So, to answer your question, I am doing this simulation because of the piss in question I have only local measures of deformation, and I would be interested in seeing at least qualitatively the deformation on the whole plate.

Moreover as I am considering a replacement of the material I wanted to assess how rigidity affects this deformation.

shell elements I've never heard of him, but as I said I'm totally inexperienced in this field, now I'm looking for some information...if you have any links or example to recommend it is well accepted! !