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Criteria for peak stress

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Mm.Kaiser

Mm.Kaiser

Mechanical
Joined
Nov 1, 2011
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45
Location
IR
Hi.
according to ASME Viii Div2 Figure 5-1
the criteria for Sum of PL+PB+Q+F is 2x Sa.
I always consider my maximum stress to be less than it.
But in 2017 version, this criteria was just Sa.

Am i right?
 
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The range of P+Q+F is always divided by 2 to calculate the stress amplitude. The calculated stress amplitude is compared to the allowable value. The correction made in the 2019 Edition to correct this (potential) misunderstanding.
 
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