Learning Forum

[20217579]

Hello, I am trying to simulate the mode-II fracture toughness test using the CZM, Interface delamination method. As per my understanding while using interface elements then we should not use bonded contact. My question is if we cannot use the contact option for the region where delamination is supposed to occur then how to introduce the viscous regularization parameter for the interface elements? I have attached the model tree, so it will be helpful if you can guide me on where I can introduce this parameter using the command function. Thank you.

[20217579]

Hello again, I am attaching the model picture to provide more clarification for the model tree. 

[Erik Kostson]

 

 

 

This post has a similar topic (use the commands there):

https://innovationspace.ansys.com/forum/forums/topic/how-to-solve-convergence-issue-of-delamination-by-twisting/

Put them into an apdl command added under the Inter. Delamination object marked in red in the/your above image (use matid for MATID in the TB command so: TB,CZM,matid,,,VREG)

--

TB,CZM,matid,,,VREG
TBTEMP,22.0 ! Define first temperature
TBDATA,1,c1 ! Define damping coefficient at temp 22.0 change c1 as needed

--

Thank you

Erik

 

 

 

 

[Lydia]

Hello,

The cohesive zone material (CZM) model supports viscous regularization (TB,CZM,,,,VREG) for stabilizing interface delamination. This however need the use of APDL commands.  

Please check the following links for more info 4.21. Cohesive Material Law (ansys.com) 

4.11. Cohesive Zone Material (CZM) Model (ansys.com)