Roller Element Bearing... defining contact 2

[SkagitJet]

Hi, I am trying to perform a static analysis on a roller element bearing. The bearing the following parts.

1. outer race (grooved)
2. inner race
3. cage
4. 15 cylindrical rollers

The cylindrical rollers are held on the inner race by the grooved outer race and the cage.

I need to define 3 type contact interactions.

1. Interaction between outer race with roller
2. Interaction between inner race with roller
3. Interaction of the rolled side surfaces with the outer race groove

I performed the analysis with 1 to 4 rollers. While performing the analysis with more than 4 rollers, there is a convergence issue, there are too many increments for 1 step. As a result, the job aborts.

Also, I see a warning that the slave surfaces (roller sides and roller surfaces) intersect and that they cannot be active in the same step.

I wonder how I can handle this issue. Any help is highly appreciated.

 

[corus]

Try using explicit. It can work better where there is a high degree of non-linearity

Tara

http://tinyurl.com/4ydjg7m

 

[SkagitJet]

Corus: I appreciate your reply.

I am new to Abaqus. Pls. guide me on how I can use Abaqus/Explicit instead of Abaqus/Standard for this. I mean what changes should I make to my job/model.

 

[Fabi0]

It's a different kind of step, so probably you must build up a new model.

As a matter of fact, i've done a static analysis over a full complement cilindrical rollers bearing using abaqus standard.

Your .msg tells that you have too many increment: ok, but what about this rollers? I mean, this are "working" rollers or they don't have any load in the first increment of load? Maybe a first step with a set displacement (radial) instead of a force/pressure load can give u convergence, because solver will have less degree of freedom to work with.

And you must try to "guide" rollers with boundary condition, if possibile, and release them when all contacts have converged.

And more over: your bearing is used like a wheel (outer ring can be deformed) or not?

By the way, is it a thesis work? Mine was