Contact, optistruct
Altair EmployeeHi
I have done this modeling in optistruct (an enforced displacement is applied to the back of plastic clip and required force for this this displacement is asked) but when I run the model and post process it in Hyper view I see the the clip penetrates in to the sheet metal. I think this penetration makes the results invalid. Would you please let me know what is wrong with this modeling. The model is attached
I have defined contact between all these surfaces but I don't understand why it behaves like this
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
Answers
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Hi Bita,
I think this is because the leaf screen is way too soft and doesn't provide sufficient contact stiffness.
also, why the E value is negative for the leafscreen?
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Thank you for your answer Prakash. The Young's modulus for the Leaf screen. I have entered the value of 25 Mpa for the leafscreen as Elastic modulus.
Which E is negative??
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Do you think this problem of penetration will be solved if I switch to Radioss? or do you think Optistruct is ok.
How should I modify my model to have valid results without penetration?
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bita,
For leaf screen I see the E as a negative value. Please see the image below.
<?xml version="1.0" encoding="UTF-8"?>
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Bita,
Ignore my previous reply. Looks like there is some problem with HM,
When I export to .fem file I can see the actual E value.
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So what is wrong with the model why the leafsceen has penetrated in to the sheet metal are the results valid?
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Hi Bita,
Can you change the SITFF option to HARD in PCONT card and try?
Also, I have noticed that you are using PLSOLID property for solid elements. This is valid only for Hyperelastic material.
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Hi Prakash
Thank you very much for your reply. So which card image should I select instead?
The leafscreen is made of Washington Penn 20% talc filled poly pro
The sheet metal is made of steel
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You can give try law36 for the polypropylene in Radioss.
Regards
Rahul R
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