Damage and fracture — DCB Beam Theory

Damage and fracturePASS · 0%

Damage, cohesive-zone, fracture-mechanics, or crack-growth verification. Checks: mode-I compliance and energy release rate.

Tolerance:: 5%

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Problem statement

Geometry: Symmetric DCB: E=70000 MPa, width=20 mm, each arm h=2 mm, crack a=50 mm, end load P=10 N per arm.
Material: Constitutive or analytical definition: delta=2 P a^3/(3 E I); GI=P^2 a^2/(B E I).
Boundary conditions: Required solver capability: vcct_or_cohesive_crack. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: Opening=0.892857142857 mm and GI=0.0133928571429 N/mm from elementary beam theory.

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=70000 nu=0.33
dcb width=20 thickness=2 crack=50 load=10
fix surface number 1
load surface number 2 force=10 component=y
load surface number 3 force=-10 component=y
solve linear

Results comparison

Reference value	delta=0.892857 mm, GI=0.013393 N/mm
Our result	delta=0.892857 mm, GI=0.013393 N/mm
Deviation	0%
Tolerance	5%
Status	PASS · 0%
Mesh details	Symmetric DCB specimen, arm h=2 mm, width=20 mm, crack a=50 mm

Updated: 2026-10-27 · version not recorded