topic Re: Constraints in Fusion Design, Validate & Document Forum

Constraints

harolis_susanade — Tue, 15 Apr 2025 07:03:28 GMT

My question is related to how to apply the correct constraints in the right places to Link 1. For better guidance I show below what is being asked, the context (the part in the overall assembly) and how I think it should be applied.

What is requested:

For context, the general assembly below.

So here my question: would it be correct to apply the constraints as fixed on the two mounting interfaces (with faces 1,2,3 and 4,5,6) as below?

Thank you very much for your answers.

Re: Constraints

Drewpan — Tue, 15 Apr 2025 07:55:55 GMT

Hi,

Are you talking about actual design constraints or are you referring to guides

on the assembly to assist with assembly after fabrication? What I mean by that

is that two parts that rotate together, one may have a skirt to help fit them

together and keep them there but otherwise not be part of the operation.

Or something like a flange?

What is the purpose of the constraint you are talking about?

Also, the forum will be more able to help you with the actual fusion file and not

the STEP file.

Cheers

Andrew

Re: Constraints

harolis_susanade — Tue, 15 Apr 2025 15:40:51 GMT

Hi Andrew,

yes, I'm talking about the actual design constraints. Sorry about the file format, I have uploaded it again.

For more context I must do a static study with the loads cases that you will find in the image below and then I have to do a shape optimization or generative design.

Thank you very much for taking the time to reply to me.

Best Regards

Harolis

Re: Constraints

henderh — Tue, 15 Apr 2025 17:52:15 GMT

Hi @harolis_susanade,

I would try using Fixed on (1) without selecting (2) and (3). You can try both and compare how much load is being carried by 2&3 in the Results inspection versus what it should be intuitively. You can use Remote Force to define one case, then right-click on the load case > Clone > Edit the location of the Remote Force in the cloned load cases.

After you're satisfied with the static stress results, you can right click on the study in the browser > Clone Study > Study Settings and change the type to Shape Optimization. This will retain / copy the load case definitions. The Optimized shape is only a mesh body based on the critical load paths, to be used as a guide of what the optimized shape would look like according the criteria specified. Therefore, I believe a solid body Outcome from Generative Design would satisfy the problem's solution more easily. It is a little more work if obstacle / keep out geometry needs to be created (which can be easily done in GD's Edit Model workspace, which includes a special Connector Obstacle tool for this purpose).

Hope this helps! Please let us know if you have any additional questions, comments, or suggestions.

ps: IIRC, there is a similar thread to this one with the same problem statement / design challenge that may contain additional info.

Re: Constraints

I_Forge_KC — Tue, 15 Apr 2025 19:14:20 GMT

Just another tip - while the remote force is a fine option for here, given your prompt, the point mass may be easier to implement because of the reference selection options.

Also, search my replies for the thread Hugh is referencing - I replied there also.

Re: Constraints

harolis_susanade — Wed, 16 Apr 2025 11:06:10 GMT

Thank you very much to the three of you for your answers, now it is much clearer for me. I will also check the other thread.

Thanks again.