Stress- Strain curve

[mekafime]

Hello
I made a model in ansys and obtained the Stress - Strain curve, to save computing time I used the symmetry divided the model in two and the curve obviously differs from an entire model, how can I correct that curve of a model in half?

 

[karachun]

This is nonsense, full model and model with symmetry mesh, loads and constraints should give you same results in static solution.
Look like you mess with something. Maybe your problem is not fully symmetrical in means of geometry or BC.
In addition s-s curve look weird. Is this some hyperelastic?

 

[mekafime]

Hi
Is a connection of hollow tubular section in T, material steel NL

 

[karachun]

Ok, can you explain more specific? Show mesh and boundary conditions on full and symmetrical model. Does both meshes have same size?

 

[mekafime]

Yes, similar size mesh, similar conditions, the only difference, is the half in one and the force.

 

[karachun]

Do you apply symmetry condition on section plane? You should restrain movement of nodes in direction perpendicular to symmetry plane.

 

[mekafime]

Yes, I did.

 

[L_K]

And you are probing the stress and strain values far enough from any singularities?

 

[mekafime]

All model (in a half model)

 

[karachun]

I dont understand your previous comment. You should take some elopement to plot stress vs strain relationship.
Can you show contour plot of total translation and equivalent stress for both models?