Contact simulation Abaqus

[Evila]

Hi!

Im using Simulia to solve a pretty easy problem but the simulation keeps showing me the message "aborted". The problem:
~Two cylinders, one inside the other and they are separated by only 2 mm so they are not initially in contact.
~A radial pressure is applied to the outer cylinder so that in some point it comes in contact with the inner one.
~Both cylinders are 3D deformable solids made of different elastic materials.
~Hex meshes for both of them but the inner cylinder has the finest mesh
~the slave surface is the inner cylinder and the master one from the outer cylinder
~The boundary conditions are: both cylinders are fixed on their left sides, and on their right sides there is a force in Z
~the interaction was declared as normal

I added an image, any ideas of why I cant run this?

 

[Evila]

yeeah here is the image sorry

 

[rstupplebeen]

My guess is that you need to make a couple of changes to your step definition. Make sure nonlinear geometry is turned on. Under incremention I typically change the maximum number of increments to 10000, initial 0.01, minimum 1e-8, max 0.1.

I believe the defaults are more setup for linear problems not contact hence the need to change them.

Rob Stupplebeen

https://sites.google.com/site/robertkstupplebeen/

 

[corus]

I'd do a hand calc check to make sure that the outer cylinder will contact the inner cylinder across the 2mm gap, given that the outer cylinder is restrained at both ends.

In addition I'd switch to axisymmetric geometry, unless there was some other reason not to assume axial symmetry.



Tara

http://tinyurl.com/4ydjg7m