Which shell element is capable for elasto-plastic analysis?

[TPdct]

I modeled a cantilever beam with ShellNL elements. The model has 2100 nodes. When I use elastic material, the computation is very fast and the result is correct, but when I change the material to J2Plasticity material, the computation is so slow and terminate when the material yields. The computation result of elastic stage is fine.
So which shell element is capable for elasto-plastic analysis?

[fmk]

all the shell elements are .. most assume small disp, the shellNLDKGQ takes into account large displacement. the issue you are having relates to the material and not the shell .. does the aplication just quit or does the analysis fail?

[TPdct]

The application doesn't quit, but the analysis doesn't converge, I have tried all test method, including EnergyIncr, NormDispIncr... and different algorithm including KrylovNewton, Newton, BFGS... The integrator is Displacement Control. When the displacement I imposed is small, it works well, but after many analysis steps when the displacement is relatively larger to make the material begin to yield, it begins to have convergence problem.

[TPdct]

The material I used is:
nDMaterial J2Plasticity 99 166666666666 76923076920 200000000 250000000 1 1
nDMaterial PlateFiber 100 99
section PlateFiber 4 100 0.01

[dgale]

I have the same problem. Did you fix the problem,TPdct?
Could anyone write a tipical values for H and delta parameters for steel or aluminium?

Thanks guys!

[vpapanik]

I am experiencing exactly the same problem with J2Plasticity material.

[vpapanik]

It is now corrected in the latest source code.

[alfonsogdr]

I am modeling a steel plate with shell elements and J2Plasticity material and I still have the same problem. It is corrected for sure?