3d Contact modeling between two cylinders Question
3d Contact modeling between two cylinders Question
(OP)
Hello,
I am modeling a cylinder undergoing a four point bend test in abaqus. In the model there are 2 contact interactions defined between the test fixture and the cylinder undergoing bending. These contact surfaces (of the fixture and cylinder) both are smooth cylindrical shapes. In the cylinder I have made grooves on the bottom to apply the boundary conditions along a line rather than a point.
No matter how I seem vary the contact model, I get errors. I have attempted both surface-surface interactions, and node to surface interactions. I have made a similar model only with a rectangular cross-section that converged to a solution with <1% error from hand calculation. I believe the problem to have something to do with the contact definition between two cylindrical surfaces, but am at a loss on how to correct the issue. I would greatly appreciate any help that can be offered.
I have attached my cae model.
Thanks,
Scott
I am modeling a cylinder undergoing a four point bend test in abaqus. In the model there are 2 contact interactions defined between the test fixture and the cylinder undergoing bending. These contact surfaces (of the fixture and cylinder) both are smooth cylindrical shapes. In the cylinder I have made grooves on the bottom to apply the boundary conditions along a line rather than a point.
No matter how I seem vary the contact model, I get errors. I have attempted both surface-surface interactions, and node to surface interactions. I have made a similar model only with a rectangular cross-section that converged to a solution with <1% error from hand calculation. I believe the problem to have something to do with the contact definition between two cylindrical surfaces, but am at a loss on how to correct the issue. I would greatly appreciate any help that can be offered.
I have attached my cae model.
Thanks,
Scott





RE: 3d Contact modeling between two cylinders Question
Hope one of these help,
Firehole Composites
www.firehole.com
RE: 3d Contact modeling between two cylinders Question
http://www.eng-tips.com/faqs.cfm?fid=376
http://www.eng-tips.com/faqs.cfm?fid=1083
RE: 3d Contact modeling between two cylinders Question
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: 3d Contact modeling between two cylinders Question
rstupplebeen--When you say I should be using rigid surfaces, is that different than how I have the model defined currently? I applied a rigid body constraint to the "top fixture". I am not attempting to simplify the model using symmetry planes because this is just a precursor model to an irregular geometry that is not symmetric but is similar to a cylinder.
Thanks again,
Scott
RE: 3d Contact modeling between two cylinders Question
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/