topic Re: Joints not working in simulation in Fusion Support Forum

Joints not working in simulation

chill_wes001 — Tue, 17 Mar 2020 10:51:40 GMT

Hello,

I'm trying to run a static stress simulation. The model is built with rigid joints in the design section. However, when I go into simulation, some of the parts move from where they are supposed to be. I even tried making the whole assembly one piece by using rigid group to no avail. Any help appreciated.

Many Thanks,

Wes Payne

Re: Joints not working in simulation

sunil.v.b — Tue, 17 Mar 2020 11:35:51 GMT

Hi @chill_wes001 Could you please share a screencast or the design file with us?

Sunil

Fusion Development team

Re: Joints not working in simulation

chill_wes001 — Tue, 17 Mar 2020 12:04:57 GMT

I've just tried to do it - servers have processed it now I think?

Here you can see that I have all sorts of joints holding it in place and it jumping after I click on the simulation section. This happens with the generative design tab and simulation but none of the others

Re: Joints not working in simulation

chill_wes001 — Tue, 17 Mar 2020 12:05:38 GMT

Re: Joints not working in simulation

sunil.v.b — Tue, 17 Mar 2020 18:30:59 GMT

Thank you @chill_wes001 for sharing the screencast. Not able to find anything obvious from the screencast. The desing looks ok to me. Could you please share the design file with us so that we can investigate this further at our end?

Re: Joints not working in simulation

chill_wes001 — Wed, 18 Mar 2020 09:29:09 GMT

@sunil.v.b I've attached the simplified file as a step and f3z.

Re: Joints not working in simulation

chill_wes001 — Wed, 18 Mar 2020 09:31:57 GMT

Step not attaching :S

Re: Joints not working in simulation

sunil.v.b — Wed, 18 Mar 2020 10:26:12 GMT

Thanks a lot @chill_wes001 for sharing the f3z design file. Its OK if the Step file is not uploading. I am able to reproduce the issue with supplied f3z. This looks like a bug in our software. Interestingly am not able to reproduce the same issue with other models, seems like some bug is uncovered with this speicfic file. I have logged an internal ticket FUS-62567 for our tracking. We will update you as soon as we find anything to share.

Thanks again for reporting this issue and helping us with data to reproduce.

Sunil

Fusion Development team

Re: Joints not working in simulation

chill_wes001 — Wed, 18 Mar 2020 11:05:36 GMT

OK thank you

Re: Joints not working in simulation

chill_wes001 — Thu, 19 Mar 2020 12:43:22 GMT

@sunil.v.b It's a wider problem with inserting assemblies into assemblies and then simulating. I've had exactly the same issue with a different project. Only workaround I can find is to insert all the individual parts into the file being simulated. It's really not good for commercial software.

Re: Joints not working in simulation

giorgio.demurtas — Mon, 23 Mar 2020 14:01:50 GMT

I have the same problem, and the "piece" that does not respect the joint (in the simulation) is an assembly made of 3 components, inserted into the main assembly. My walk-around was to insert the components directly into the main assembly (without making an assembly with 3 components in a dedicated file).

Re: Joints not working in simulation

keqingsong — Mon, 30 Mar 2020 17:38:39 GMT

Good news, this issue is getting fixed in the upcoming update.

Re: Joints not working in simulation

chill_wes001 — Tue, 28 Apr 2020 11:58:44 GMT

Hi @keqingsong it did fix in an update...

....and it's broken again in the next one

Is joining components in an assembly not quite a fundamental piece of the software? We're paying for this rubbish?

Re: Joints not working in simulation

kgrunawalt — Wed, 29 Apr 2020 21:53:40 GMT

Hi. Is it possible that the problem simulation model was created before the fix and has not been updated since the fix? A simulation model is updated automatically when something changes in the source design. It is possible that doing a compute all or some other change while in the design and then switching to simulation will fix the problem.

Re: Joints not working in simulation

TitanFox239 — Thu, 16 Feb 2023 11:47:47 GMT

This is literally still not fixed after another three years.

Re: Joints not working in simulation

TitanFox239 — Thu, 16 Feb 2023 11:57:41 GMT

Update: for a quick and dirty solution just "break link" with all outside parts and reload the simulation space. You may need a rigid joint for everything after breaking the link.

Re: Joints not working in simulation

areda.eyoas-ergetu811 — Thu, 09 Mar 2023 12:06:35 GMT

I couldn't get any solution for this issue. It is really annoying.

Re: Joints not working in simulation

swapnil.hamdapureDDSVZ — Tue, 14 Mar 2023 04:53:26 GMT

@areda.eyoas-ergetu811 Sorry to hear that the issue still persists at your end. Is it possible for you to share the Fusion file? It would be really helpful for us to investigate the issue further.

Re: Joints not working in simulation

seiyaotani23 — Wed, 24 May 2023 21:02:34 GMT

This is still an issue by the way. Please fix this.

Re: Joints not working in simulation

swapnil.hamdapureDDSVZ — Thu, 25 May 2023 04:26:33 GMT

@seiyaotani23 Is it possible to share the fusion file so that our development team can investigate the issue further?