Damage and fracture — Cohesive Mixed Mode

Damage and fracturePASS · 0%

Damage, cohesive-zone, fracture-mechanics, or crack-growth verification. Checks: normal-shear initiation surface.

Tolerance:: 5%

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Problem statement

Geometry: Quadratic nominal-stress initiation with Tn=Ts=10 MPa; apply tn=6 MPa and increase ts.
Material: Constitutive or analytical definition: (tn/Tn)^2+(ts/Ts)^2=1.
Boundary conditions: Required solver capability: mixed_mode_cohesive. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: Damage initiation occurs at ts=8 MPa because (6/10)^2+(8/10)^2=1; no initiation at ts=7.9 MPa.

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=135000 nu=0.3
cohesive mixed-mode Tn=10 Ts=10 criterion=quadratic
interface surface number 1 surface number 2 law=cohesive
load surface number 3 traction_normal=6.0 traction_shear=8.0
solve nonlinear method=newton steps=10

Results comparison

Reference value	ts_init=8.0000 MPa, index(7.9)=0.9841
Our result	ts_init=8.0000 MPa, index(7.9)=0.9841
Deviation	0%
Tolerance	5%
Status	PASS · 0%
Mesh details	Quadratic nominal-stress initiation with B-K / power-law mixed-mode law

Updated: 2026-10-27 · version not recorded