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Stress- Strain curve

thread569-458403

Stress- Strain curve

Stress- Strain curve

(OP)
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?

RE: Stress- Strain curve

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?

RE: Stress- Strain curve

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

RE: Stress- Strain curve

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

RE: Stress- Strain curve

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

RE: Stress- Strain curve

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

RE: Stress- Strain curve

(OP)
Yes, I did.

RE: Stress- Strain curve

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

RE: Stress- Strain curve

(OP)
All model (in a half model)

RE: Stress- Strain curve

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?

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