Enclosed Voids Constraint

Baturalp OGUZ_20261

I am currently studying on a capability of optistruct about additive manufacturing constraints,

I don't want to exist enclosed voids in my topology optimized design due to having powder inside the geometry, i think there is no option to apply that constraint to design directly, however i was wondering if it is possible or not, integrate that constraint to design indirectly? (Draw direction etc.)

If it is possible could you please help me how it is done?

 

Thanks for taking time.

Viraj Kulkarni_21218

Baturalp OGUZ_20261 said:

Thank you for your reply, can please share if you have any paper which is about what draw constraint parameters are? (like stamp thickness etc.)

These links will guide you to understand and apply the manufacturing constraints with toplogy optimization

Topology Optimization Manufacturability (altair.com)

OS-T: 2005 Design Concept for a Structural C-Clip with Minimum Member Size Control (altair.com)

OS-T: 2030 Control Arm with Draw Direction Constraints (altair.com)

OS-T: 2060 Symmetry and Draw Direction Constraints Applied Simultaneously (altair.com)

OS-T: 2090 Extrusion Constraints (altair.com)

Viraj Kulkarni_21218

Yes, the main advantages of using OptiStruct for optimization is its ability to use manufacturing constraints.

 

Here is a quick example for your question of not creating voids in topology optimization.

You can check out all the different types on manufacturing constraints in the model browser.

Hope this helps.

Baturalp OGUZ_20261

Thank you for your reply, can please share if you have any paper which is about what draw constraint parameters are? (like stamp thickness etc.)

Viraj Kulkarni_21218

Baturalp OGUZ_20261 said:

Thank you for your reply, can please share if you have any paper which is about what draw constraint parameters are? (like stamp thickness etc.)

These links will guide you to understand and apply the manufacturing constraints with toplogy optimization

Topology Optimization Manufacturability (altair.com)

OS-T: 2005 Design Concept for a Structural C-Clip with Minimum Member Size Control (altair.com)

OS-T: 2030 Control Arm with Draw Direction Constraints (altair.com)

OS-T: 2060 Symmetry and Draw Direction Constraints Applied Simultaneously (altair.com)

OS-T: 2090 Extrusion Constraints (altair.com)

Baturalp OGUZ_20261

Thank you Viraj!

Baturalp OGUZ_20261

After checking all links, i still have some questions,

It is mentioned in the tutorials that the drawing direction constraint is related to casting, should i think that the draw direction is as building direction in additive manufacturing? and single draw type should be use for modeling (because, part is printed in one way) and clicking the box of "no hole" will prevent the occuring enclosed voids?

 

Thank You.