Why is there excessive displacement?

[Cha20]

Hi everyone!

I'm currently modelling a spot welded specimen using shell and beam elements, but ANSYS is giving me an error regarding a small equation solver pivot term. I tried using the nropt,full command. The error message produced when using this said that I have excessive displacement and that the model may not be sufficiently constrained.

However my model is constrained in all degrees of freedom on one side and in 5 degrees of freedom on the other. Basically there can only be displacement in the x-direction.

Any ideas of what is happening please?

Thanks and regards

 

[flash3780]

It could be caused by a few things; can you post a picture of your model?
If you're sure that the model is constrained, look at your material properties. If you slip a decimal or three on your stiffness, ANSYS will have a fit.