Contact — Frictionless Slide

ContactPASS · 0.06%

Unilateral, frictional, sliding, or interference-contact verification. Checks: normal/tangential basis update during sliding.

Tolerance:: 5%

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Problem statement

Geometry: Compress a block against a plane and translate it tangentially by ten element widths while holding normal force constant.
Material: Constitutive or analytical definition: Frictionless contact traction has no tangential component.
Boundary conditions: Required solver capability: large_sliding_frictionless_contact. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: Integrated tangential reaction=0; normal reaction remains equal to applied normal force; strain energy is independent of tangential position away from boundaries.

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=1e9 nu=0.0
box width=16.0 depth=2.0 height=0.5
box width=0.8 depth=0.8 height=0.5
contact frictionless slave="surface number 11" master="surface number 6"
mesh tet size=1.0 order=1 bonding=0
fix surface number 1
fix surface number 8 component=y
load surface number 12 force=-1000 component=z
displace surface number 12 value=10.0 component=x
solve nonlinear steps=20
extract reaction target="surface number 6"

Results comparison

Reference value	1000.0000 N (R_N=1000 N, R_T=0 N, dU/U0=0 across 10 element widths)
Our result	1000.0000 N (max\|R_N-1000\|=2.47e-8 N, max\|R_T\|=0.00 N, max dU/U0=0.064%)
Deviation	0.06%
Tolerance	5%
Status	PASS · 0.06%
Element family	Solid element
Mesh details	124 nodes, 102 tet4 elements (16x1x1 base strip + sliding block, 20 sliding steps across 10 element widths)

Updated: 2026-10-27 · version not recorded