Von Mises Stress: Yielding & SF Criterion Equation

xJJx · Jan 13, 2019

Hi, just wanted to ask for the von Mises criterion equation, is the equation without the SF (the one I circled in blue) only applicable when yielding has FIRST occurred? (i.e when SF=1)? and is the equation including the SF (one I circled in orange) applicable to all cases? (i.e whether the material has yielded or not)
thank you

xJJx · Jan 13, 2019

sorry the images didn't upload on my original post:

Von Mises Stress: Yielding & SF Criterion Equation

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Von Mises Stress: Yielding & SF Criterion Equation

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