Is there a way to set the number of integration points or change the element type (reduced or fully integrated) in Mechanical? It appears that mechanical automatically creates 3 integration points and reduced integration Shell 281 elements when you use a quadratic mesh on a shell element. All...
I work with shell models almost exclusively for pressure vessels, but for our weld fatigue analyses we use 2D or 3D solid models where you can model the fillet. I wouldn't trust stress results of shell model welds because of the sharp edges/singularities. As you saw, their stress values are...
You say the membrane stress was 25k but your figure shows 17k? Also, looks like there's some bending in the legs in the first figure; is gravity applied? Are there other loads applied?
The code only applies to the vessels themselves; internals are not part of the code. However, the code is usually used as a guideline for the design of internal equipment. It is up to the engineers/company to deicide if the additional costs of code compliance (like impact testing) are worth it.
For a shell model (ASME Sect. 8 Div. 2 analysis) of welded structures, when is it okay to average across part boundaries and when should you look at the parts separately? I realize solid sub models should be used to examine the welded areas because of discontinuities, but I was taught that it is...
