Learning Forum

[vighnesh.nandavar]

I am currently working on submodelling a pump housing to study crack propagation. I am referring the ansys tutorial. I have the following question

I first do a main model and apply my boundary conditions and solve it. Later, in the submodelling window, I give "Cut Boundary Constraint". From what I understand, Cut boundary Contraint will tell the submodel to behave the same way as the main model with respect to displacements. i.e., if a selected region of my part undergoes 1mm displacement, then my submodel should also undergo 1mm at that point of interest so that I can carry out region specific analysis (Do let me know if I am wrong of this idea). In the submodel, I give a Pressure loading on one of the face. Now the question is, why is it required to give the Pressure again when the main model had already been given one? I played with some parameters. I reduced the main model pressure from 1000MPa to 1MPa. Interestingly, the results of interest in the submodel reduced by rougly half. Only the JINT parameter reduced significantly.

 

Hoping to understand some concepts better

 

 

[Erik Kostson]

 

 

 

 

 

Hi

 

It is described in our help manual chapter 7.2 and uisng Submodeling:

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v252/en/ans_adv/Hlp_G_ADV4_2.html

So if the pressure load is inside the submodel it needs of course to be added – to check this, you can do a quick simple check on a 3D plate with a pressure load and clamped all aorund (submodel is a square say in the centre of the plate). Or even better a cantilever beam (3D part) – split it in half (suppress one side) and take cut bc on the middle of the beam (run with and without the pressure load)

All the best

Erik

 

 

 

 

 

[vighnesh.nandavar]

Will try :) 
Thank you Erik