August 29, 2022 at 3:24 pmziahussain252Subscriber
I am doing analysis on gasketed flange joint with 8 bolts as shown in the model. I want to tight the bolts in cross tightening order (1,5,3,7,2,6,4,8) using bolt pretension.
When I tight the bolt 1 , 5 then there comes a gap between other bolts means contact status changes. After this as I tight the other bolts then the head of the bolt elongates unrealistically towards the nuts side as shown. I am using frictional contact between the flange surface and the bolts head because it is one of my objectives. Kindly help me in this regard as I have tried my best to solve this but unable to get the realistic results.
August 30, 2022 at 12:27 ampeteroznewmanSubscriber
I will try and help if you create a Project Archive .wbpz file. Use File, Archive. Take the .wbpz file and put it on a file sharing site such as Dropbox, Google Drive or Jumpshare, which is what I use, then post the link to the file in your reply. If using Googe Drive, make sure to set the permissions so anyone with the link can download it.
Say what version of ANSYS you are using in your reply.
August 30, 2022 at 1:35 pmziahussain252Subscriber
Thank you Peteroznewman. Here is the link
Also, I am using ANSYS 18.1.
August 30, 2022 at 6:44 pmpeteroznewmanSubscriber
I don't have ANSYS 18.1 to use to send you back an archive. I can look at your model and try to figure out what you need to change to make it work.
August 31, 2022 at 1:07 amziahussain252Subscriber
Thank u so much
Moreover as I guess that this issue is related to contacts because as I use bonded contact then I get the realistic result but I want to use either frictional or frictionless.
In addition to it, u may send m archive in ansys 2020 R1 or 2021 R1 I have acces to it.
September 2, 2022 at 12:16 pmFlorian.CHANCELSubscriber
I tried some configurations, and I found one working.
I think the problem comes from setting of your bolt pretension.
Pretention screw 2
Pretention screw 3
And results are : No distortion or peak stress apprears
Can you try ?
September 2, 2022 at 12:32 pmpeteroznewmanSubscriber
You have a valid solution to the problem. Sorry I did not have time to look at this till the weekend.
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