Bolt Pretension 1D Elements - Problem
Altair EmployeeHello,
while modelling a simple calculation for a pretensioned bolt with 1D elements, i got the following problem:
- In the visualisation you can see, that the 1D element on which the pretension is applied to gets lengthen. (A 'pretension' is applied, but to the wrong direction.)
- According to the pretension file (.pret) everything seems to be reasonable, even if i add an additional tension load case after the pretension sub. However the contact forces do not.
The '1D bolt' i used is a single ROD element , which is connect to the guiding (independent) node of a RBE2 spider of the washer (shell elements) to both sides. I attached a picture where you can see my definition in the Pretension Manager window. I also attached a picture of the property of the ROD element.
I read all the infos in the users guide and online-help, but can't find an answer to my question. How can this problem be solved? Do i have to use a special orientation of the pretension section and how is this defined correctly.
Please, i need your help!
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Answers
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Altair Forum User said:
According to the pretension file (.pret) everything seems to be reasonable, even if i add an additional tension load case after the pretension sub. However the contact forces do not
HI,
Could you please share details and also related files?
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Hey Prakash,
here are the related files of the calculation.
The contact 1 and 2 are the important ones between the two parts, which should be connected by the pretensioned bolt.
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Please, help me!
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