Hello,
Has anybody seen a problem like this in using simulation? I am using Solidworks 2009 SP 1.0. The model has sheet metal (mostly) which Sim is treating as shells quite nicely, and some shafts treated as solids with coarse mesh. The solids are there to lend structural support or just to accurately represent the real life product.
The forces I have turned on are gravity and a 2g stopping deceleration to simulate a sudden stop. The sheet metal panels on my assembly seem to be melting like vaccuum-formed plastic (deformations range from 0.1 inches to 37,000 inches on the same sheet metal part whose total size is less than 100 inches square x 0.105 inches thick)!
If there is an option to click, a button to press, that will make this go away, I'd be happy to know about it! I had this problem yesterday when dealing with beams and shells, but I thought I solved it by avoiding beams and switching to solids.
Any help would be appreciated!
Has anybody seen a problem like this in using simulation? I am using Solidworks 2009 SP 1.0. The model has sheet metal (mostly) which Sim is treating as shells quite nicely, and some shafts treated as solids with coarse mesh. The solids are there to lend structural support or just to accurately represent the real life product.
The forces I have turned on are gravity and a 2g stopping deceleration to simulate a sudden stop. The sheet metal panels on my assembly seem to be melting like vaccuum-formed plastic (deformations range from 0.1 inches to 37,000 inches on the same sheet metal part whose total size is less than 100 inches square x 0.105 inches thick)!
If there is an option to click, a button to press, that will make this go away, I'd be happy to know about it! I had this problem yesterday when dealing with beams and shells, but I thought I solved it by avoiding beams and switching to solids.
Any help would be appreciated!
I have tried to re-create the problem and I may have come up with the cause. I am working with large assemblies so I have been doing small studies first, then copying the contact sets up to the next largest assembly. So the "no penetration" contact set was created in a different configuration than the one in which I see my sheet metal melting. Even though the faces are correct, I believe there is some error when copying to another configuration and using it in another study than where it was created. The shell elements melt when this error is present.
To workaround...
If you are copying contact sets, leave out the "no penetration" sets and re-create them in each study that you do. Then use bolted connectors as usual. If your sheet metal melts, delete the "no penetration" contact sets and re-make them. Hopefully you don't have too many.
Until Solidworks comes up with a more robust solver, this workaround will have to do.
David