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Dakshitha

Checking penetrations between parts

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Component tickness unavailable. No templae loaded"

Hello!

I have a model with 5 components ith small initial penetrations. How can I check for them? I have already tried Tools> Penetration check

 but it gives me an error "

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15 minutes ago, Dakshitha said:

@prakash

 

Sure. I want to remove the penetrations in this model either manual or automatic. I'm using LS Dyna. Can you please help.

newfin.k

@Dakshitha

 

Since it is the LS-Dyna model and it is related to the solver, I would suggest you contact Dyna support. 

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4 minutes ago, Prakash Pagadala said:

@Dakshitha

 

Since it is the LS-Dyna model and it is related to the solver, I would suggest you contact Dyna support. 

@Prakash 

So Hypermesh cannot import the LS Dyna solver deck and remove these penetrations?

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3 minutes ago, Prakash Pagadala said:

It can, but the error message may mean something else and the solver support can only clarify.

OK @Prakash Pagadala

I imported a different version of the file (attached herewith). Now it works when I open up as Hypermesh project and import LS Dyna keyword deck. However, it says " No intersections/penetrations" when I phynopen_reflect_final_sep.k sically zoom in I will clearly see penetrations. Any thoughts?

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I can see a free face in comp 6!

Maybe, problem is due to precision & tolerance

Your model size is too small. If you are using length unit "meter", scale model 1 million times and use unit micrometer

Then you can check intersection easily.

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29 minutes ago, tinh said:

I can see a free face in comp 6!

Maybe, problem is due to precision & tolerance

Your model size is too small. If you are using length unit "meter", scale model 1 million times and use unit micrometer

Then you can check intersection easily.

@tinh

Thank you very much that actually seems to work!!! Really helpful

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@tinh

Scaling up worked and now i can see the penetrations. And now I'm manually fixing some intersections/penetrations because the automatic one removes too much material sometimes. 

However, while manually moving some nodes, I get an error "Nodes or elements selected do not belong to component"

 

How do I fix this? 

Thanks in advance

 

DW

 

 

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5 minutes ago, tinh said:

Could you explain by images? 

i'll try=)

ok, example i've got penetration. but i hadn't geometry.

image.png.ff9335789edbc4c6182ede467024abad.png

but i want to fix my penetration.

i have diffrent ways to do it:

image.png.0d9d6bd0956b1289e8e8a51d7be0d7d7.png

image.thumb.png.85dddbbbc09e84d7e9c20f7bf1f003e8.png

image.png.ccf94381dc28e5500bbeaa9432d85b14.png

but it's all for nodes and geometrical objects. i can't choose <element>. 

yeah i know one way->from solid->element faces->element faces to surfaces-> you may try. but surfaces are in bad tolerance to element faces.

i think if i can choose aline nodes by mesh faces it will be great tool. in ansa i can do it and i can choose the offset distance btwn tagert elements faces and nodes.

is it clear?=)

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Yes, i understand

You want to click an elem and hm will move nodes on it face (or offset at some clearance)

I will try making that

 

Currently, you select n1 n2 n3 on elem and that is inconvenience, don't you?

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17 minutes ago, tinh said:

Currently, you select n1 n2 n3 on elem and that is inconvenience, don't you?

it's impossible if you should align 1000 nodes and have 100 elements for example=)

i use this tool when i have a geometry. 

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@tinh

Thank you very very much. It works. 

 

Do you know how I can make multiple copies of a component using translate? And then check for duplicate nodes and merge?

Sorry for the continuous trouble.

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1 hour ago, Dakshitha said:

@tinh

Thank you very very much. It works. 

 

Do you know how I can make multiple copies of a component using translate? And then check for duplicate nodes and merge?

Sorry for the continuous trouble.

 

Invoke dropdown menu Tools>Transformation 

And Shift+F3 to merge nodes

 

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On 10/18/2018 at 4:35 PM, Mrt said:

it's impossible if you should align 1000 nodes and have 100 elements for example=)

i use this tool when i have a geometry. 

 

OK. so i will make a script with a loop that project node to the closest elem

Mrt likes this

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