Merging and Forming in sculpt mode

[Anonymous]

Hi,

I have 2 parts, that I created in sculpt mode seperately and then I insert one part to the curent design and break link, so that i can edit the form by double clicking the blue box in the timeline. My question is, is it possible to merge these two parts and form the merged body in sculpt environment? Or how can I open these 2 parts in sculpt mode simultaneously?

Thx for your reply

[TrippyLighting]

Whether that is possible depends on what outcome you expect..

In general, you T-Spline geometry is pretty bad. the T-Spline mesh is way too dense and in all likelihood this object would have been better designed with the normal solid modeling functions in Fusion 360. I don't see any compelling reason to model this using a T-Spline.

It can  certainly be done, but not using the techniques you used to create this geometry.

Maybe take a step back and explain hat it it you are trying to accomplish in general with this design an we go from there.

[Anonymous]

I made the entire model for an eigenfrequency calculation. The reason why I used this technique because I didnt have the dimensions of them and they are deformed during the separation process. So I tought, I could build the model in sculpt mode, where I can move and free form them later wehn i need. It actually worked quite well for this calculation.

But now I want to do a vibro-acoustic analysis and to do that I need to create a void volume in abaqus. It isnt possible to get the void volume in abaqus with this model, because the connections between the parts arent perfect. There are holes and overlapped edges. So Im thinking if its possible to modify the model, so that i can fix the connections.

[TrippyLighting]

Hmm... I ma not sure what you edited you post and deleted some important information:

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@Anonymous wrote:

The whole model is a crossbeam from a car. The reason I used this technique is because I needed to depict the geometry of the whole crossbeam as good as possible for an eigenfrequency calculation and it worked quite well.

Building the whole model with the normal solid technique was difficult for me cause I didn’t have the dimensions of it. I only had the real crossbeam. So I decided to split it and scan it. After that I imported the mesh data from scanning to fusion 360 and built them in sculpt environment, because in the final phase I need to free form and positioning the individual parts, so that i get the crossbeam model as a whole.

But now I need to change the model to do a vibro-acoustic analysis and to do this I need to create a void volume from the crossbeam in abaqus. The problem is that the intersections between parts aren’t perfect (it isn’t smooth, there are holes and overlapped edges, which could be tied together for the eigenfrequency calculation, but for this analysis it isn’t possible), those cause the void volume in abaqus can’t be created.

So I’m thinking, if I can just free form this model in Fusion 360, so that the whole crossbeam becomes one body. Do you see any possibility to do that ? The main point is to fix the intersections. no hole. no overlapped edges. So I was wondering if I can just use the merge edge function in sculpt mode to combine the parts. but whenever I openned the sculpt mode of on part, I can't modify the other part

The modeling technique you have used for this is imprecise in the way you applied it and created geometry that deviates from any vehicle cross beam I've ever seen. Having worked for a number of years in a vehicle assembly plant I've seen quite a few of those.

Results based on that geometry are likely to be invalid. 

While you can "merge"this in sculpt mode, it is more work, then redesigning this simple geometry from scratch using solid modeling techniques. I am not sure where you picked up that you need to have dimensions to model this. That's not the case.

Just as you use the sculpt mode you can make assumptions about dimensions in a solid model.