Learning Forum

[Ingeniorator]

Hi all,

 

I'm diving into the topic of functually graded materials in the domain of additive manufacturing recently and getting to know Ansys. There are a few good tutorials about lattice optimisation, but a few questions arose during testing.

 

1. How do you cut off the lattice densitiy below a certain threshold, say everything under a value of 0.1 gets set to 0 and disappears?

2. How do you get rid of the outer structure which stays solid after a common lattice optimisation? Is there a way to attain an open structure where the lattice structure reaches the outer bounds of the optimised body?

3. After implementing the lattice in the body in Spaceclaim, it gets faceted. How do you merge the facets after this step so that it can be properly meshed?

4. After trying to export an optimised and latticed structure as .step file to mesh in Hypermesh, the .step file itself was empty. Could someone have any pointers as to why this was the case?

 

Thank you very much for taking the time to read and hopefully answer my questions.

[Ingeniorator]

No one?

[Kajal Khan]

1. How do you cut off the lattice densitiy below a certain threshold, say everything under a value of 0.1 gets set to 0 and disappears?

--> In lattice optimization there is an option to select minimum lattice density.

[Ingeniorator]

Thank you very much for your extensive answer. However, there is one issue concerning the first question: The minimum lattice density is interpreted as a lower limit, meaning calculated values below this threshold get set to the (higher) allowed minimum value and do not vanish. Does this functionality exist in Ansys or would it be necessary to do a standard topology optimization first and then apply a lattice optimization on top of that?