Very different displacements in Linear and Non-Linear Analysis

[uribemax2]

Hi all,

I am using the Marc solution (SOL 600) for solving a contact between two cylindrical pieces (one inside the other) but I've obtained a very different result in "Rotational Displacements" that when I used the Linear Solver (without contact).

I tried to deactivate contact zones and ease the model but nothing has changed.

The load is applied to the inside piece through CBEAM elements because it is generated due to inertia loads and I must put it in the CoG of the model. Being under this load, this piece displaces respect to the other one causing a collision that is what I want to study.

I've also tried to change CBEAM orientation but nothing... I don't know what to do

Thank you very much in advance.

 

[hezhj2000]

Not sure about your question. Results without contact is different from results with contact. That sounds reasonable to me.

 

[uribemax2]

Thanks for answering.

Sorry for my bad explanation, I meant that the real load case involves a contact, but the inner piece rotates before contact the other one, and this rotation is which is different between linear and non-linear.

What I did to make the analysis easier was to delete the contact and therefore I could run both analysis (linear and non-linear) to compare them.

To sum up: I run two analysis without contact, and the results are different.

Thanks.