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  1. CKerr

    Change Integration Points and type in Mechanical

    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...
  2. CKerr

    Weld Modeling

    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...
  3. CKerr

    The stress on F&D head is extremely high in ANSYS Workbench as compared to ASME VIII Div-1.

    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?
  4. CKerr

    ASME Section VIII Div. 2 - Internal Piping

    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.
  5. CKerr

    Shell FEA Averaging/Smoothing Across Part Boundaries

    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...

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