Learning Forum

[muhd.safwan78]

Hi, I’m currently working on a static structural analysis of the L4-L5 lumbar spine segment. I’m trying to model the spinal ligaments using 3D truss elements (tension-only), but I’m having trouble importing the ligament geometry. I created lines in SpaceClaim to represent the ligaments, but unfortunately, these lines are not recognized in ANSYS Workbench Mechanical, so I can’t assign them as truss elements. Could you advise on how to properly model tension-only ligaments using lines in SpaceClaim so that they’re recognized in Mechanical?

[Stella Peloni]

Hello,

Thank you for your question. You can create the lines in Spaceclaim, and assign a beam with circular cross section to them. Then in Mechanical, the body will be succesfully importes as line/beam bodies. In order to be meshed using truss elements, please click on the body under the Geometry in the Model tree, and set the Model Type to Link/Truss. In that way, your truss will be meshed with LINK180 elements (you can check that in the ds.dat file after your analysis is run) or you can write an input file (click on Solution tab and then ):

Thank you.

Kind Regards,

Stella

[muhd.safwan78]

i try to run the model after follow the instruction above using line bodies/beam but the cant solve the model.

[muhd.safwan78]

this are my detail of the beam where i change the model beam to truss. the link180 element automatically or need to do manually to add it