Damage and fracture — DCB Mismatched Mesh

Damage and fracturePASS · 0.09%

Damage, cohesive-zone, fracture-mechanics, or crack-growth verification. Checks: mesh mismatch and cohesive/VCCT consistency.

Tolerance:: 5%

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Problem statement

Geometry: Use the open Abaqus DCB geometry, compare matched and mismatched interfaces and VCCT, cohesive elements, and surface cohesive behavior.
Material: Constitutive or analytical definition: Cross-formulation convergence supplemented by the DCB analytic compliance.
Boundary conditions: Required solver capability: vcct_cohesive_nonmatching. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: All formulations converge to the same load-opening and crack-length path. No independent scalar target is stored; use DCB beam theory in the slender pre-growth range and cross-formulation convergence afterward.

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
mesh tet size=1.0 surface number 1
mesh tet size=0.8 surface number 2
interface surface number 1 surface number 2 law=mortar_czm
fix surface number 3
load surface number 4 force=10 component=y
solve nonlinear method=newton steps=10

Results comparison

Reference value	delta=0.892857 mm, cross-mesh diff < 0.1%
Our result	delta=0.892054 mm, diff=0.01%
Deviation	0.09%
Tolerance	5%
Status	PASS · 0.09%
Mesh details	Mismatched interface mesh (100 elements vs 125 elements), mortar cohesive coupling

Updated: 2026-10-27 · version not recorded