Checking penetrations between parts

Hi @Dakshitha

Please check whether thickness is assigned or not to the elements through a property.

Hi @Dakshitha

 

Please check whether thickness is assigned or not to the elements through a property.

@Prakash Pagadala Thanks.

But I have all solid elements. What is this thickness here?

@Dakshitha

Could you please share the model file?

@Dakshitha

 

Could you please share the model file?

@prakash

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

Unable to find an attachment - read this blog

@prakash

 

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

@Dakshitha

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

Unable to find an attachment - read this blog

@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?

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

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 phy sically zoom in I will clearly see penetrations. Any thoughts?

Unable to find an attachment - read this blog

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.

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

<?xml version="1.0" encoding="UTF-8"?>

you should create contact pairs/general contact.

if you have contact you can easy check it in HM.=)

@Mrt Thank you very much. I saw this in LS Prepost. But I need to FIX it. (not automatically)

@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

Hi, do not use tools in penetation tab to fix

Use shift F4 to translate instead

@tinh

is it possible to project with offset nodes to FE face?

like in ANSA.

it will be very usefull tool.

<?xml version="1.0" encoding="UTF-8"?>

Could you explain by images? 

I think every fuction in ansa can be made in hm

Could you explain by images? 

i'll try=)

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

but i want to fix my penetration.

i have diffrent ways to do it:

<?xml version="1.0" encoding="UTF-8"?>

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?=)

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?

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. 

@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.

@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

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

OK i put it here. 

@tinh

i have errors!

Could you try running it in hypermesh (not hypermesh desktop)

@tinh

another one question, pls!

i can't see element thickness.

i am doing optimization tutorial os 2020, but i haven't result 'element thickness'.

i have just had in my solution 'base thickness'.  and it doesn't change from iteration to iteration.

<?xml version="1.0" encoding="UTF-8"?>

i have the same situation=)

Maybe, student version does not support