[b]Stress output more than defined ultimate stress in input?[/b] 2

[jfymsam86]

Hello all
I’ve modeled the beam to column connection with this material:
E=2e6 kg/cm^2 , 0.3
3 line stress-strain diagram (hardening):
3690 0
3700 0.019756
4880 0.21552
But at result, I have von-mises stress about 6400 kg/cm^2 at some nodes!
Loading is cyclic displacement.
I didn’t define any damage. I’m going to follow the stress in the beam to find when all nodes of cross section will be yield (4880).
Now I have 6400 at some nodes (that they’re buckeled)

Thanks

 

[burningDiesel]

It's an interpolation issue, at the integration points the stress will be OK. It's also a sign you need a more refined mesh.