October 27, 2022 at 5:24 pmjavat33489Subscriber
I have doubts about the results of the static analysis calculation. I have a pipe that stands on the ribs. The contact bonded pipe is welded to the fins. But according to the results of the calculation, stresses were formed not at the point of contact, but where the pipe does not touch the rib. This is fine?
Here's how it turned out:
I expected stress at the point of contact between the pipe and the fin:
I also tried MPC contact. It did not help.
Please help me. Thanks.
October 28, 2022 at 10:13 ampeteroznewmanSubscriber
For the MPC contact, after the model has solved, in the Outline, click on the Solution Information folder. You might see the Graphics window be replaced with the Worksheet tab and it will show the text from the solve.out file. Click on the Graphics tab at the bottom and you should see red spider elements that show how the Bonded Contact was created. Please show that image in your reply.
The size of the spider is controlled by the Pinball Radius in the Contact defintion.
November 1, 2022 at 2:09 am
November 1, 2022 at 9:56 ampeteroznewmanSubscriber
The largest portion of the Mechanical app where the graphics are displayed is on the Geometry tab. Look at the bottom edge of the Mechanical window. When you click on Solution Information, another tab appears called Worksheet. Click on the Geometry tab to see the MPC spider elements.
November 2, 2022 at 1:10 pm
November 2, 2022 at 9:29 pmpeteroznewmanSubscriber
You can make the reach of the spider elements smaller by typing in a small distance on the Pinball Radius in the Contact definition.
November 3, 2022 at 7:18 pmjavat33489Subscriber
>>small distance on the Pinball Radius
This does not help.
- Then I decided to check the geometry. And I saw that the details penetrate each other a little.
2. I made two test models. One left as is with penetration. In the second, he pulled out the pipe so that there was no penetration. And assigned nodes to both on the plate in contact. In each of the models, I made one side with novdas and left the other with a full face plate contact
3. I did the calculations and got the following results
Model without penetration
Model with penetration
What do you think about this? I think you need to use the node method.
November 4, 2022 at 12:01 ampeteroznewmanSubscriber
You may need smaller elements on the pipe. I can't see how large they are. I can use a Mesh Sizing for the Contact.
November 7, 2022 at 7:50 pm
November 7, 2022 at 8:27 pmpeteroznewmanSubscriber
November 8, 2022 at 6:08 pmjavat33489Subscriber
Thanks a lot!
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