Mechanical APDL Structural Analysis Guide

n

n

n

n

=

=

max

*

max

δ

σ

δ

max

*

n=

δnc=

t

t

t

t

=

max

δ*

mmax

max

*

=

=

τ

δt

δtc=

m m

n n

c

=

=

λ

α δ* δ δ δ

β

t t

* c

=

The material constants are input via the TBDATA command:

Mean- Property

ing

Con-

stant

C1 σmax Maximum normal traction

Normal displacement jump at the completion of debonding

C2 

C3 τmax Maximum tangential traction

Tangential displacement jump at the completion of debonding



C4 

Ratio of δ



to δ



, or ratio of δ

to δ^

C5 α

C6 β Non-dimensional weighting parameter

For more information about defining a cohesive zone material in an interface delamination analysis,
see Bilinear Cohesive Zone Material for Interface Elements in the Material Reference.

12.2.3.4. Viscous Regularization for Cohesive Cone Material (CZM).

The cohesive zone material (CZM) model supports viscous regularization (TB,CZM,,,,VREG) for stabilizing
interface delamination. For more information, see Cohesive Material Law in the Material Reference and
Viscous Regularization in the Mechanical APDL Theory Reference.

12.2.4. Meshing and Boundary Conditions

12.2.4.1. Meshing

There are three options available for meshing interface elements:

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Modeling Interface Delamination with Interface Elements