Learning Forum

[Chirag]

Respected Sir,

My model is of Composite Pressure Vessel filled with hydrogen. I need to calculate equivalent stress and maximum principal stress and maximum principal strain on liner of Pressure Vessel having external length of 827 mm ; internal length of 778 mm; external dia of 279 mm and internal diameter of 230 mm in which liner is of 5 mm thickness. How we do that?

Below is the tank image. I need to draw same Pressure Vessel. Please tell me how to do this?

 

[Sampat Kumar]

Hi Chirag,
If you want to create geometry in the spaceclaim then I would suggest you search in youtube with keyword"Modeling a pressure vessel using ANSYS" 

Best Regards,
Sampat

[Chirag]

Sir, I try to redraw the same pressure vessel. The equivalent stress needs tocome under ultimate strength of the material which is 25 MPa for HDPE liner material but my pressure vessel is having more stress than 25 MPa which is wrong. So I think maybe of geometry that's why It deformed more. Below is the image provided of that.

 

 

 

Liner Properties are given below: 

[Chirag]

Could you please reply of my problem?

[Sampat Kumar]

 

Hi Chirag,
Thanks for your patience.
Geometry seems good but you have to check if the geometry has exact dimensions or not according to your reference. 
if your geometry is correct then will you please check
1. location of the maximum stress developed, is it at the point? if possible please upload the screenshot of the stress. 
2. can you try to turn on the large deflection in the analysis setting?
3. How the cylinder is fixed in your reference paper or in the actual condition? 
choice of boundary conditions can significantly affect the results of your simulation.