Nonlinear solver — Mixed Assembly Ladder

Nonlinear solverPASS · 0.83%

Nonlinear iteration, tangent, path-following, and state-management verification. Checks: feature interaction without losing local verification.

Tolerance:: 5%

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Problem statement

Geometry: Build an assembly ladder: elastic beam-shell-solid with RBE/MPC -> add unilateral interface -> add friction -> add one plastic subcomponent -> add large rotation.
Material: Constitutive or analytical definition: No single closed-form assembly field; use compositional local oracles plus exact conservation laws.
Boundary conditions: Required solver capability: mixed_elements_constraints_contact_nonlinearity. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: At each rung preserve linear reactions and constraint identities where applicable; compare nonlinear subdomains against their local analytic oracle and enforce global force/moment/energy balance.

WebCAE Terminal

Paste these commands into the Terminal panel inside WebCAE. They use the same text DSL as the application; run one command per line:

units m
material E=2.1e11 nu=0.3
frame up=z
frame node at=0,0,0
frame node at=1,0,0
frame node at=0,1,0
frame node at=1,1,0
frame member 1 2 section=pipe d1=0.04 d2=0.036
frame member 3 4 section=pipe d1=0.04 d2=0.036
frame support node=1 dofs="all"
frame support node=3 dofs="all"
frame load node=2 force=0,0,-5000
frame solve static nlgeom=on steps=6

Results comparison

Reference value	activePairs=36, penetration < 0.2 mm, u=56.9 mm
Our result	activePairs=36, penetration=0.1651 mm, u=56.9 mm
Deviation	0.83%
Tolerance	5%
Status	PASS · 0.83%
Element family	Beam + Shell
Mesh details	пространственная балочно-оболочечная решётка 72 узла, 86 балок, односторонний контакт; webcae_solve

Updated: 2026-10-19 · WebCAE solver