contact problem in Abaqus
contact problem in Abaqus
(OP)
problem:
body X contacts body Y (both iron and rubber on the edge), e.g. rubber on rubber . In visualization it can be seen that body Y go through body X. Contact definition is hard and srface-to-surface.
How can I fix this problem?
thanx for helping
body X contacts body Y (both iron and rubber on the edge), e.g. rubber on rubber . In visualization it can be seen that body Y go through body X. Contact definition is hard and srface-to-surface.
How can I fix this problem?
thanx for helping





RE: contact problem in Abaqus
RE: contact problem in Abaqus
RE: contact problem in Abaqus
Do you mean that this penetration is just a visual problem in Abaqus?
RE: contact problem in Abaqus
Anyway, u can try to run again the job with the contact diagnostic tool on (step, output, diagnostic....or something like :) ). In this way, you can have a complete report of overclosure (if exist) in the .msg file and in the .odb.
If pressure are ok, maybe it's only a visualization problem.
Fabi0
RE: contact problem in Abaqus
/Stig
RE: contact problem in Abaqus
Fabi0, when using penatly method to define tangential friction between surfaces, you mention you this allows for some overclosure. Can this be overcome by selecting to remove overclosure in the interaction module?
Thanks
RE: contact problem in Abaqus
I was talking about penalty in the constraint enforcement method (under normal behavior) but a quick reading to documentation let me believe it works the same. Anyway, what do you mean with "remove overclosure" ?
Do u mean ---> Edit Interaction --->"adjust to remove overclosure" ?
If you do, the answer is no: u can use this option only to remove initial overclosure, but during analysis the overclosure is ruled by the constrain enforcement method. Penalty had a "relaxed" formulation, so it is cheaper of computational time, but only because penalty allow nodes of the slave surface to penetrate into the master surface for a small amount of overclosure.
Fabi0
RE: contact problem in Abaqus
job completed succesfully by choosing small sliding,
but if I choose finite sliding it aborts after 30- 40 %
In finite sliding there is no penetration.
so how can i fix the problem?
RE: contact problem in Abaqus
First of all: what kind of surface discretization did you use in creating model? Surface to surface or node to surface?
.msg file told you something? Any singularity warning?
Body X and Body Y had the same contact areas? I mean, there is contact along the perimeter of the two bodys? (In other words, do you have two aligned cubes with the same side length that make contact on a square face?) In this case you may have chattering problem, where finite sliding is less efficient than small sliding.
You should run analysis with contact diagnostic option, so u can see if contact point couple passes from close to open.
Fabi0
RE: contact problem in Abaqus
surface to surface
error: max. penetration in some nodes