Difference in methods of modeling connectors
Hello, I wonder if the different fastener connector realization types can be created manually by the use of constrained nodal rigid body elements?
I am working with LS-DYNA interface, I wonder what the difference is between bolt(CBAR) and bolt(general) described in https://2023.help.altair.com/2023/hwdesktop/hwx/topics/pre_processing/connectors/realizations/bolt_general_c.htm?
I want to model a threaded insert that is inserted into a solid part, what is the best approach for doing that? Is there a specific fastener connector type that is recommended that includes the connections inside the hole created by the threads? Or should you model the insert as a solid cylinder and use a "spider" element on top of it as in the figure below?
What is the difference between modeling a bolt that is not threaded and modeling a threaded screw/insert when it comes to the type of fastener connector that is appropriate? How can you manually model the connections for a threaded screw/insert?
Is the connector type below only appropriate for shells and for modeling bolts? Can it be used for modeling threaded screws/inserts as well or not?
Finally, are RBE2 elements the same as constrained nodal rigid body elements in LS-DYNA?
Thank you in advance!
Best Answer
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Nadja,
The link you have shared just explains the method to create bolt by connectors. You can have either CBAR or CBEAM element between the RBE2s connecting both the parts.
As you are talking about Threaded bolt, it can be done in Optistruct for which you need to add CLRNC card in CONTACT. with this card you can define pitch angle, pitch, bolt major/mean thread diameter etc. With this you can capture the bolt parameters in a defined way. Refer the below link for this. Attaching one reference model too.
For your last question regarding RBE2, it is YES.
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Altair EmployeeAnswers
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Nadja,
The link you have shared just explains the method to create bolt by connectors. You can have either CBAR or CBEAM element between the RBE2s connecting both the parts.
As you are talking about Threaded bolt, it can be done in Optistruct for which you need to add CLRNC card in CONTACT. with this card you can define pitch angle, pitch, bolt major/mean thread diameter etc. With this you can capture the bolt parameters in a defined way. Refer the below link for this. Attaching one reference model too.
For your last question regarding RBE2, it is YES.
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Thank you for your help Rahashri!
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Nadja Rabizadeh said:
Thank you for your help Rahashri!
You can mark the answer correct so that it will show the status as solved.
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