Hello
I used separation contact between two mating surfaces. and they are connected though bolted connection.
but they act like a bonded contact.
Could anyone help me with this?
Thank you
Solved! Go to Solution.
Solved by John_Holtz. Go to Solution.
Hi @yta10
I have a few questions:
Thank you for your reply.
1) It's linear static mode
2) Numbers mean Contact types and locations
All separations
1- 3EA of bolt washer locations to the orange surface.
2-bottom gray surface without 3 washer locations to the orange surface.
3 and 4 - fillet surface to the orange surface.
As you can see, depending on the contact areas.. I got all the different results. I expected all the results would be the same. Especially, when I applied contacts (1,2,3,4).. it acted like boned contact.
What contact location is the proper contact to simulated separation?
Hi @yta10
Thanks for the images. I understand the problem now.
I do not know why it would behave like that. If you want me to look at it, please provide the Inventor files (the assembly and part files, .iam and .ipt, compressed and posted to the forum) for model "D".
Since you are performing a linear analysis which is based on infinitely small displacements, no nodes on the fillets (3 and 4) will contact the top of the orange piece. Therefore, separation contacts are not needed on the fillet. You only need to defined the separation contact between the flat face (or faces) of the gray part to the flat face (or faces) of the orange part.
Hello,
Thank you for you reply.
Please find attached for the contact problem.
And, I would like to ask you one more question.
Contact : separation (without fillet area)
Test A : 1 Bolt
Test B : 3 Bolts
For Test A, I thought the bolt stress would be at least 1/3 of the TEST B.
But the stress on Test A is even less than Test B.
Would you please let me know why this happens?
Test A
Test B
Hi @yta10
Contact
Thank you for the model. I am getting similar results when using version 2022. I have notified the developers.
My original suggestion of not including the rounds in the contact are one solution. Another solution is the following:
Items 2 and 3 make the analysis very similar to the linear static analysis, so the analysis runtime is similar.
Bolts
In a properly designed and assembled bolted connection, 90% of the stress in the bolt is due to the bolt preload. The load added to the components increases the bolt stress by a small percentage. These are the results that I get using nonlinear static in version 2022:
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