Self contact in optistruct

tuan trinh

hi people,

at present, i am practing  about self contac in optistruct, but the result of simulation is not righ, that is why please help me, thank 

condition: hyper 2017

*both Part A and part B use material Fe, E 70 Gpa.

* i carry out many situation to self contact, but is not ok

-situtaion 1

Patten1
Card image: contact
Type:slide
Ssid : part a and part B
Msid: part a and part B
Morient: norm
Discret:S2S
Trach:Consli

-situtaion 2

Patten2
Card image: contact
Type:slide
Ssid : part a and part B
Msid: part a and part  B
Morient: norm
Discret:S2S
Trach:Finite

Patten3
Card image: contact
Type:slide
Ssid : part a and part B
Msid: part a and part B
Morient: norm
Discret:S2S
Trach:small

 

refence document

https://insider.altairhyperworks.com/wp-content/uploads/2018/10/TT-1328-OptiStruct-Self-contact-with-surface-to-surface.pdf

https://community.altair.com/community?id=community_question&sys_id=1966ccf61b2bd0908017dc61ec4bcba3

 

***special situtaion

when i change Discret:S2S to N2S, it can not running, 0 percentage.

>>> all situation have a result as NG, it has penetration although i have set self contact it

 thanks

 

Adriano_Koga

please take care, as your green part is a shell mesh, and not a solid one.

You are calling it self-contact, but what you're trying to do apparently is simply regular contact between 2 parts.

Instead of selecting all elements as master and slave, break into 2 different contactsurfs(set segments): One for the green part, and another for the brown part.

But first of all correct your model, so that both are 3d mesh.

 

When you create as 'set segment'/contactsurfs, you will be able to see these pyramids, and they should point each other, in order to the contact to be identified without any further MORIENT options.

tuan trinh

thank you sir