Nonlinear 2d structural analysis with component inside component failing

Christian Nörenberg

Hello,

I want to do a structural analysis with rotation (RFORCE).

My model is periodic with 60°, so I used SPC at the edge nodes with dof2 = 0.0 and a cylindric system.
(There is an hyperworks example for this, but I didnt find the tasks from the tutorial in the fem file)

What I added to the model:

• nonlinear material curve
• two materials / properties
• cylindrical system
• NLPARAM
• SPC for periodicity
• contact (with/without)

It is working without the red component, but with it the solver is failing.
Also I added contacts (slide & stick) between both components, but then other errors occure.

Do you have any ideas how to do it correctly? Mabye mesh the air inside the blue component?
Thanks a lot!

Jan Grasmannsdorf_20379

Hello,

the issue with the model is that the contact search doesn't find a contact based on the "Elementset" definition. The search algorithm works better if you use nodesets instead of elementsets in the contact. With this update + the option adjust = NO in the contact, your model will converge.

Jan

Jason_Craanen

Hello,

I would start with this article:

Tips & Tricks: OptiStruct NonLinear Analysis

https://community.altair.com/community?id=community_blog&sys_id=538764ab1b3790d4a5f742eddc4bcba4&view_source=searchResult

Jan Grasmannsdorf_20379

Hello,

the issue with the model is that the contact search doesn't find a contact based on the "Elementset" definition. The search algorithm works better if you use nodesets instead of elementsets in the contact. With this update + the option adjust = NO in the contact, your model will converge.

Jan

Jan Grasmannsdorf_20379

Here is an updated model that will work (v2022)

Vrunda Magadum

hello,

i am doing the similar analysis with full rotor laminate. when i tie the contact between rotor shaft and laminate it works fine but when i apply friction contact it behaves differently.

 

 

Please let me what can be done