Under stress admissibility criteria, there are four options. What is the difference between total resulting stress and total primary stress? What is local and general primary membrane?

The general and local membrane stresses refer to the local and general areas in your model (look under named selections to see where the areas are). The local areas are the ones close to singularities of your model (nozzles, radius change, etc). The general area is the rest of the structure. Resulting and total primary stresses are related to the sum of membrane+bending or membrane+bending+peak. Sometimes they are equal.

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