Truss elements and precondition
Truss elements and precondition
(OP)
I want to simulate a case in abaqus that my truss element does not get activate in the very beginning. As a clear-cut example, assume its first length is 2 mm. I want it to become active when it gets to let say 6mm. So I want to define a condition for it, that it gets to a certain point of length and then become active.
I would be happy for any input or comment you may have.
Regards,
Ardalan
I would be happy for any input or comment you may have.
Regards,
Ardalan





RE: Truss elements and precondition
If, for whatever reason, you really want linear material models, then you could have two trusses with their nodes equivalenced (i.e., nodes on top of each other in the exact same geometric location), with two different materials specified to each truss. Alternatively, you could use a field variable to change the stiffness as the field variable changes. While the latter approach is simple, either of these methods will create a bit of a headache for the solver because the stiffness is not going to be smooth.
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RE: Truss elements and precondition
Regards,
Ardalan
RE: Truss elements and precondition
Maybe this is easier:
Split the rope/beams in the middle and add a connector element in between. Use connector stop to indicate that a specific movement is not allowed. With that, the connector can be compressed without resistance, but lengthening is not allowed.
RE: Truss elements and precondition
Regards,
Ardalan
RE: Truss elements and precondition
*No Compression
could be helpful.
RE: Truss elements and precondition
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RE: Truss elements and precondition
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Are you new to this forum? If so, please read these FAQs:
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http://www.eng-tips.com/faqs.cfm?fid=1083
RE: Truss elements and precondition
Ardalan