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Insert laminated into composite plies

Altair Forum User

Hello Altair Community!

I would like to model a so called 'bighead' insert which is laminated between the plies of a composite plate. I want to simulate the rip out and measure the force etc.

So how can I model properly this problem? I attached an image where you can see how I want to model this insert.

Should I use solid or shell element? If I use ply-based modeling I can not find a way to model a bighead between plies.

Thank you for your answer in advance!

image.png.f7967aaaa33ee1d2f016d5c8f72c134d.png

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Altair Forum User

Hi Imre,

Please refer below post. It is similar to your issue. I hope it helps.

https://community.altair.com/community?id=community_question&sys_id=4486483a1b2bd0908017dc61ec4bcbe9

Thank you

Altair Forum User

Hi Premanand!

Thanks for the answer, I couldn't find this topic because I had searched for keywords 'inserts', 'composite' etc...

The topic what you linked in is very helpful, thank you for it.

Do you or anyone know which is the best way to model this kind of 'rip out problem' if it's important to catch the real behavior of the rupture of the composite plate?

I think solid element would be better option in this case but I don't know how can I model properly composite with solids. Are there a same solution like in the case of shell elements: create plies and then a stack laminate or should I create all the solid elements separately? In that case it would be very thin solid element which could cause inaccurate results.

Thank for the help!

Altair Forum User

Hi Imre,

I think you need to model it with solid elements only. But, i don't think you can perform Rupture analysis of composite plate in Radioss (it will not support).

Thank you