At the before how do we solve the bolt pretension problem?
Altair EmployeeAt now if we have the bolt we can consider it bolt pretension in the analysis.
And I want to ask at before if we have the bolt and we just neglect the pretension.
How do we solve the bolt problem in the case? Just set the bolt to be freeze contact in the model?
We all use the 3D pretension now. There has a question about what different between 1D and 3D pretension.
Answers
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Altair Forum User said:
How do we solve the bolt problem in the case? Just set the bolt to be freeze contact in the model?
Yes, considering the bolt as rigid.
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@Prakash Pagadala Thanks to your apply.
So at the before if we neglect the pretension force, we used the RBE2 in the bolt?
And we will set freeze contact of the bolt?
I have another question about why we now use the 3D pretension?
I think is 1D pretension can't completely see the stress of our bolt, but this just my idea.
Like this two photo if we see the stress the 1-D bolt will lose some layer of elements.
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If you are not interested in the bolt at all, you can use RBE instead of the bar or beam.
Yes, it is simplified over 3D with better computation time. But compromise on results.
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@Prakash Pagadala Thanks to your reply.
So the bolt and part will set freeze contact, right? Because we are not interested in bolt.
I got it . So 1D bolt just save the time but we neglect the bolt's stress.
1D bolt will applied the pretension on our model, we just neglect the bolt phenomenon.
The phenomenon in the full model will be correct because we have applied the pretension on it.
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@Prakash Pagadala Do I describe right about the last post?
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Altair Forum User said:
So the bolt and part will set freeze contact, right? Because we are not interested in bolt.
I got it . So 1D bolt just save the time but we neglect the bolt's stress.
1D bolt will applied the pretension on our model, we just neglect the bolt phenomenon.
The phenomenon in the full model will be correct because we have applied the pretension on it.
Not really, in reality, 3D is more close to reality. 1D will just realize the 3D to 1D and we somewhat compromise at results. But this doesn't mean that there is no stress and no force is transferred with 1D
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