Learning Forum

[tomdillon97]

Hi,

 

I want to run a coupled simulation of crack growth that arises from fluid-solid interface. I am unsure of how to setup my dynamic mesh so that as the crack grows in a structural simulation, a fluid mesh fills the void (thus creating a larger surface area over which the fluid pressure acts). Is this possible using ANSYS (mechanical + fluent) coupled functionalities? I know how to define a critical fracture toughness, how to define interface delamination, and how to create a coupled fluid-solid interface in ansys. Are there any particular settings in I should be aware of when defining a dynamic mesh that grows from an initial 0 thickness crack to a fluid domain?

 

Thanks!

Tom 

[Rob]

You'll need to start the model off with a small crack, and note that mesh requirements from Fluent are going to be high. 

[tomdillon97]

Thank you,

 

So I can simply define the crack as as a fluid solid interface, and as delamination progresses, the mesh will grow from the 0 thickness surface utilising dynamic meshing?

[Rob]

You'll need a finite thickness to start with: you can't change the topology with moving mesh. 

[tomdillon97]

You'll need a finite thickness to start with: you can't change the topology with moving mesh. 

 

 

Hi rwoolhou,

 

to follow up on this, I am using VCCT and an FSI in ansys. My fluid + solid geometry are as follows.

 

I have a small initial crack as above. Will I see the FSI grow if I remeshing is used once delamination begins (at the critical G1 value)?

 

Many thanks

Tom