Autodesk Fusion 360 Validation 10 - Thick-Walled Cylindrical Vessel with Internal Radial Pressure

[@navalfa7291]

Is there any reason you only applied Z sym only on the bottom of the cylinder instead of both top and bottom? I can see some gradient difference in your displacement plot at 6:41.

[@mikefiedler2039]

Hello Adil Apha - thanks for watching the video! So, the z symmetry constraint (or Tz) constraint is really there just added at one end of the model to keep the model statically stable - but I don't want to over constrain the model. To apply the z constraint at the opposite end would restrict any axial expansion or contraction that might happen in the model due to the loading. When we look at one of the radial directions, we do expect it to be a non-gradient result (e.g. same at the top and bottom)... but right, since I didn't control that growth or contraction, the model does experience about .0015" of axial contraction. So, at the 6:41 mark in the video, what is displayed is total displacement - or a combination of the x, y and z components - and because of that difference in the z results, we get the gradient. Good observation, hopefully that explanation makes sense to you. In short though - ultimately the most important thing is trying to make sure that your constraints match the 'real world' as much as possible when it comes time to perform your analysis... and good to observe how the decisions to apply (or not apply) particular constraints influence those results. Take care!

[@navalfa7291]

@@mikefiedler2039 Understood. Thank you for your detailed response.