Learning Forum

[seyyedeshahrzad.tabatabaei]

I am using a 1D beam model (BEAM189 with large-deformation effects enabled) and would like to divide the beam into two segments with different flexural rigidities, E1 and E2 (both constant, but different values). What is the recommended approach to do this? Should I create two separate line bodies in the geometry, or is it possible to define a single line with a spatially (coordinate-dependent) elastic modulus? Thanks.

[peteroznewman]

Use two line bodies with Shared Topology to connect them is the simplest approach.

[seyyedeshahrzad.tabatabaei]

Thank you. I want to create two connected lines (so that the beam is continuous) but have them treated as two separate line bodies (one per line, so that I can assign different materials). However, when I sketch the second line starting from the endpoint of the first, ANSYS (2022 R1) automatically treats them as a single line body. How can I force ANSYS to create two distinct line bodies while keeping them attached?

Thanks!

[peteroznewman]

Use SpaceClaim.

[ErKo]

 

 

 

 

 

In DM create 3 points, and then use the Lines from Points tool and just generate 2 lines with add frozen option though (not add material) – finally form a multi-body part to connect the vertices (common vertex between shared by line bodies).

 

 

 

 

 

[seyyedeshahrzad.tabatabaei]

Thanks. I used SpaceClaim and started the second line exactly at the end of the first one; I even used a coincident constraint; however, ANSYS still treats them as two separate bodies, and I encountered the following two errors:

1) Solver pivot warnings or errors have been encountered during the solution.  This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues.  Check results carefully.

2) A solver pivot warning or error has been detected in the UZ degree of freedom of node 7 located in SYS\Beam (Circle2). This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues.  Check results carefully. You may select the offending object and/or geometry via RMB on this warning in the Messages window.

[ErKo]

Beams are hinged not sharing same node. To resolve In SC define shared topology:

https://www.youtube.com/watch?v=aqAYnZXoUHQ

In DM sue multi-body part.

 

All the best

[seyyedeshahrzad.tabatabaei]

It worked! Thanks very much!

[ErKo]

Glad it helped