beam with nonlinear material

[wojtekmath]

Hi Everyone!

I have question:
Whitch analises works with the Beam/Plate/Solid elements with the nonlinear material (bilinear material)???

I made tests and i see it looks like in tabele below:


Sol 106 + bilinear material + beam ----- it doesn't work
Sol 106 + bilinear material + plate ---- it work
Sol 106 + bilinear material + solid ---- it work

Sol 401 + bilinear material + beam ----- it doesn't work
Sol 401 + bilinear material + plate ---- it work
Sol 401 + bilinear material + solid ---- it work

Sol 402 + bilinear material + beam ----- I don't know
Sol 402 + bilinear material + plate ---- I don't know
Sol 402 + bilinear material + solid ---- it work

Sol 601 + bilinear material + beam ----- I don't know
Sol 601 + bilinear material + plate ---- it work
Sol 601 + bilinear material + solid ---- it work

Please check my list.
Usualy Your answers are better and faster than Femap support in my county

BIG THANKS FOR ALL

 

[FEAster_man]

Hi,

In SOL401 (possibly other solvers as well) you have to define the beam property as PBEAML instead of PBEAM to account for nonlinear material.
When you define the beam cross section in the upper right corner you can choose between Standard and Nastran definition and then choose the PBEAML/PBARL under Section Evaluation at the bottom of the window.

 

[karachun]

In SOL106 beam material can only be elastic-perfectly plastic (H=0) according to documentation.

 

[BlasMolero]

Hello!.
Also please note in geometric nonlinear analysis with Simcenter NASTRAN (SOL106) the elements may undergo large total displacements and rotations , YES, but the net deformation of each element has to remain small, therefore these elements are called “small strain” elements, for LARGE STRAINS you need to go to SOL401/402.

1-D CBEAM (SOL401/402)
• SOL401 does support material nonlinearities in CBAR or CBEAM elements only for sections TUBE, L
(PBEAML only), I, CHAN, T, BOX, BAR, I1, CHAN1, Z, and ROD.
• SOL402 supports material nonlinearities for standard sections (PBARL/PBEAML), which should be thin walled for accuracy (e.g. Full Circle not allowed).

2-D SHELL(SOL401/402)
• 2D shell elements generally support material and geometric nonlinearities.
• CTRIA3 and CQUAD4 are treated as CTRIAR and CQUADR respectively.

3-D SOLID (SOL401/402)
• Solid elements support material and geometric nonlinearities.
• Recommend using higher order elements when bending effects are significant, especially when element distortion is expected to be large.

Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director

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