Changing geometry - Abaqus 1

[SofiaB]

Hello everyone!

So I have a truss modeled in Abaqus. For that, I made all the parts individually (the superior chord, inferior chord, and diagonals) and then went to the Assembly and created an instance to organize the truss and finally merged everything together. Now I wanted to change the height(so a geometry change) of just one of the chord, and after regenerating that part I found out that this change didn't translate in the assembled truss. I will leave bellow an image of my model database( I identified the dependent and independent instances)

Thanks in advance for all the help much needed.

 

[FEA way]

It would be better to create this truss as a single part or use constraints to connect them together instead of merging.

 

[SofiaB]

Isn't there any way that I can modify the geometry after merging? I'm tight on time for redoing the truss in the part section and is much easier to arrange the different parts in the assembly section.

Thank you in advance.

 

[FEA way]

Once you merge the parts, you get a new part which is automatically instanced in assembly while other instances are suppresses. Changes to the original parts can’t affect merged instance.

 

[SofiaB]

Yes, that makes sense.
If I create a set in the part section for each of the different elements, do the sets transfer to the merged part, and can I then make geometric/ property changes?(taking into account that I would have to rearrange the elements again)

 

[FEA way]

Unfortunately, the sets will have to be redefined. Yet another reason not to use Merge/Cut Instances tool in this case.