Contact — Cattaneo MINDLIN

ContactPASS · 0.2%

Unilateral, frictional, sliding, or interference-contact verification. Checks: central stick radius and annular microslip.

Tolerance:: 5%

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Problem statement

Geometry: Hertz circular contact radius a=2 mm, normal force P=100 N, mu=0.3, monotonic tangential force Q=15 N.
Material: Constitutive or analytical definition: Classical Cattaneo-Mindlin partial-slip solution.
Boundary conditions: Required solver capability: frictional_partial_slip. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: Stick radius c=a(1-Q/(mu P))^(1/3)=1.58740105197 mm; slip occurs only in c<r<a.

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
material E=1000 nu=0.3
import path="half_space.step" format=step
material E=100000 nu=0.3
import path="spherical_indenter.step" format=step
contact frictional mu=0.3 slave="surface number 7" master="surface number 6"
mesh tet size=0.1 order=1 bonding=0
fix surface number 1
load surface number 8 force=-100 component=z
load surface number 8 force=15 component=x
solve nonlinear steps=2
extract contact_status target="surface number 7"

Results comparison

Reference value	1.587401 mm (c=a(1-Q/(muP))^(1/3), P=100 N, Q=15 N, mu=0.3)
Our result	1.590569 mm (P=100.0000 N, Q=14.9743 N, stick=793 nodes r<=1.5811 mm, slip=452 nodes r>=1.6000 mm)
Deviation	0.2%
Tolerance	5%
Status	PASS · 0.2%
Element family	Solid element
Mesh details	6724 nodes, 19200 tet4 elements (40x40 circular contact grid h=0.1 mm, 1245 active contact nodes inside r<2 mm)

Updated: 2026-10-27 · version not recorded