Contact with a rigid body
Contact with a rigid body
(OP)
Hi, I'm modelling a square steel beam connected to an end palte being twisted and pushed into a rigid surface.
I've modelled it in shell as my beam is hollow and will be too thin for proper analysis. I'm using a static linear perturbation step for the analysis and I'm not sure how to model the contact surface for the model. I've included a picture of what my model looks like after the job with only the punching force.
As you would see, the model is directly being pushed into the rigid body without and interaction.
I would like to know how to model this surface properly.
Thanks
I've modelled it in shell as my beam is hollow and will be too thin for proper analysis. I'm using a static linear perturbation step for the analysis and I'm not sure how to model the contact surface for the model. I've included a picture of what my model looks like after the job with only the punching force.
As you would see, the model is directly being pushed into the rigid body without and interaction.
I would like to know how to model this surface properly.
Thanks





RE: Contact with a rigid body
RE: Contact with a rigid body
Does this mean I'll have to create the entire model using planar and axisymmetric parts?
RE: Contact with a rigid body
For the model shown, you should be able to do exactly as portliner says above, and make sure that you only define a mechanical contact property.
Regards
Martin
RE: Contact with a rigid body
However there still seems to be a major problem. In this model I am pushing the endplate into the rigid body. I am applying force all along the endplate closest to the rigid body and not the plate at the end of the beam.
I've changed my contact properties, with the rigid surface being the master and the endplate being the slave. It is frictionless,in the normal behaviour there is a penalty and in the damping the coefficient is 0.001 and the clearance is 1. Note that I have played with these values plenty of times with the same result.
This is my result however
As you can see there is no way that this is the correct result as it defies to laws of physics.
Still looking for help and thanks in advance
RE: Contact with a rigid body
- Remove the contact damping and clearance. Not sure that you actually need these for your model...
- Make sure that NLGEOM is set to ON.
Regards
Martin
RE: Contact with a rigid body
Tara
http://tinyurl.com/4ydjg7m
RE: Contact with a rigid body
corus: I was only testing the model to see if it would bend inwards or not.