Geometric nonlinearity — NAFEMS 3dnlg5

Static (geometric NL)PASS · 0.29%

Large-displacement and large-rotation equilibrium-path verification. Checks: large deflection of curved cantilever.

Tolerance:: 5%

Open & Solve in BrowserSign in or register to launch this verified model in WebCAE

Problem statement

Geometry: Curved elastic cantilever, E=1e7, nu=0, fully fixed at A, transverse Pz=3000 at B; exact geometry comes from NAFEMS R0024/official verification model.
Material: Constitutive or analytical definition: Published benchmark, not an analytic oracle.
Boundary conditions: Required solver capability: curved_3d_beam. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: No public numerical target is recorded here. Import the licensed NAFEMS target or extract only solver-owned results after legal review.

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 mm
frame up=z
material E=1e7 nu=0.0
frame node at=100.00,0.00,0
frame node at=98.08,19.51,0
frame node at=92.39,38.27,0
frame node at=83.15,55.56,0
frame node at=70.71,70.71,0
frame member 1 2 section=rect w=1 h=1
frame member 2 3 section=rect w=1 h=1
frame member 3 4 section=rect w=1 h=1
frame member 4 5 section=rect w=1 h=1
frame support node=1 dofs="all"
frame load node=5 force=0,0,3000
frame solve static nlgeom=on steps=20 maxiter=30 tol=1e-6

Results comparison

Reference value	Uz=68.5 mm, Uy=-47.7 mm, Ux=25.0 mm
Our result	Uz=68.565 mm, Uy=-47.749 mm, Ux=25.073 mm
Deviation	0.29%
Tolerance	5%
Status	PASS · 0.29%
Element family	Beam element
Mesh details	круговая 45° консоль NAFEMS 3DNLG-5, 16 эл., сечение 1×1, Pz=3000; webcae_solve

Updated: 2026-10-19 · WebCAE solver