Twin Disc Assembly in Abaqus 6.9
Twin Disc Assembly in Abaqus 6.9
(OP)
Hello All,
I am looking to run a contact model between two discs in abaqus 6.9. I have modelled the disc in Solidworks 2009.
It is better to create the assembly in Solidworks or abaqus? Is there any way of importing the assembly into abaqus from solidworks other than parasolid (don't have the licence to do this).
Also when I define one of the disc's to be rigid when I import it, I can not create an assembly instance as I get an error message explaining that "a solid rigid part cannot be instanced in an assembly".
Thanks
OptiEng
I am looking to run a contact model between two discs in abaqus 6.9. I have modelled the disc in Solidworks 2009.
It is better to create the assembly in Solidworks or abaqus? Is there any way of importing the assembly into abaqus from solidworks other than parasolid (don't have the licence to do this).
Also when I define one of the disc's to be rigid when I import it, I can not create an assembly instance as I get an error message explaining that "a solid rigid part cannot be instanced in an assembly".
Thanks
OptiEng





RE: Twin Disc Assembly in Abaqus 6.9
Try importing it as the other type of rigid (discrete or analytical). I can never remember which is which. For your geometry I might consider not making it rigid unless you have steel in contact with plastic or something similar.
I hope this helps.
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
I am trying to model a shaft which stays fixed in position and resists a disc when I a applied a force in the x direction. However, when I run the analysis, my disc just goes straight through the shaft likes it no even there. Can anyone help?
Thanks
OptiEng
RE: Twin Disc Assembly in Abaqus 6.9
RE: Twin Disc Assembly in Abaqus 6.9
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
Thanks
OptiEng
RE: Twin Disc Assembly in Abaqus 6.9
1. Stick with the defaults as much as possible.
2. Make parts that will contact in contact at the beginning of analysis if possible (RBM)
3. Switch up master and slave even if it violates 'best practices'
4. Try both node to surface and surface to surface because they have different default settings. N2S has the legacy settings.
5. A trivial amount of friction sometimes helps even in frictionless (?) situations.
6. Adaptive stabilization fixes most initial RBM issues just make sure the energy associated with it does not get too high.
7. Slight wiggling of a model such as mesh size or initial step size sometimes gets a solution to converge.
8. Use tech support they are great and will save you a lot of headache.
I hope this helps.
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
RE: Twin Disc Assembly in Abaqus 6.9
Thanks
OptiEng
RE: Twin Disc Assembly in Abaqus 6.9
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
I am still having issues with the disc moving through the other disc like its invisible. I am not sure how to aply and use adaptive stablization as you suggested above. Any other tips?
Thanks
RE: Twin Disc Assembly in Abaqus 6.9
"The *adaptive mesh constraint option may not be used in analysis with linear geometry"
Can anyone help with what this means?
Thanks
RE: Twin Disc Assembly in Abaqus 6.9
I don't think you need to use adaptive remeshing. That is meant for very large deformations.
Can you post your CAE file?
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
I have posted the CAE file at http://my.engineering.com/pg/file/OptiEng
Any advice would be much appreciated.
OptiEng
RE: Twin Disc Assembly in Abaqus 6.9
RE: Twin Disc Assembly in Abaqus 6.9
I am trying to save images (e.g. JPEG's) of my deformed plots and XY data plots. Anyone know how this is done in ABAQUS 6.9 as I am new to the interface of ABAQUS.
Thanks
Opti Eng
RE: Twin Disc Assembly in Abaqus 6.9
Changes
1. Stabilization
2. Nonlinear geometry
3. Default interaction property
Attached is a picture.
I hope this helps.
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
RE: Twin Disc Assembly in Abaqus 6.9
See attached.
Rob Stupplebeen
RE: Twin Disc Assembly in Abaqus 6.9
I have been trying to model a scaled down version of the disc (now 60mm diameter not 600mm as before). However I can not seem to get a stable result and not sure why. I have compared the models to make sure I have not missed anything out. Even with a small load (10N) I seem to be getting very unreasonable results. I have uploaded the new file (along with the previous) at http://my.engineering.com/pg/file/OptiEng
Any advice would be much appreciated.
Kind Regards
OptiEng
RE: Twin Disc Assembly in Abaqus 6.9
I checked your new model and you are only constraining rotation on the disc. This is not a physical restraint. It is saying that no node can rotate at all. Your model is simply falling off of the rigid disk.
As I have said before only model half and apply a symmetry constraint on the cut.
I hope this helps.
Rob Stupplebeen