Learning Forum

[harshithmc2]

Hi, I am trying to simulate an artillery shell that goes from 0 to mach 2+ within 0.5s. I want to know the effect of the sudden acceleration on the structure and whether the shell would rip open during the inital acceleration. 
I initally thought to use a static analyis system and add the acceleation there, but due to the rate of acceleration being so high I wasn't sure it would be accurate. 
And I am not sure how to setup the simulation in Explicit. That is, the boundary conditions. 
I wanted to know what approach do I take for this. 

Thank you in advance.

[Erik Kostson]

Hi

Ansys employee can not offer advice on this, but other forum members can perhaps chime in and give some feedback.

All the best

Erik

[Dennis Chen]

 

Hey OP, I believe I just answered this question on reddit lol.   If you are the same person, basically you have to do a 1-way FSI analysis if the failure mechanism you are trying to model is the shell’s interaction with air at indicated acceleration and the pressure induced from this interaction is what you believe will cause failure. 

FSI analysis starts on the fluent/CFX side and you map the resultant pressure to the mechanical side in a 1-way coupled analysis.   If you have access to ALH (which I don’t at the moment), you can find a good course there on how to do this. 

something like this would be pretty fun to do so if you are willing to share the detailed parameter of the problem, I would love to know what those are.