Calculation of the minimum thickness for non-cylindrical valve bodies
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When calculating the minimum thickness of a non-cylindrical valve body, the formula for determining the maximum resultant stress at sections A-A and B-B includes positive and negative signs; a positive value indicates tensile stress, while a negative value indicates compressive stress. But how should these positive and negative signs be taken into account during the calculation? If the result obtained from the first part of the formula is negative, should one take the absolute value and then add it to the result of the second part?
I glanced through ASME and didn’t find any similar calculation formulas
Could you explain it in more detail? I’ve read many standards these past few days but still don’t understand it