<Dd> M S y l d = F y σ v − 1 (\ displaystyle MS_ (yld) = (\ frac (F_ (y)) (\ sigma _ (v))) - 1) </Dd> <P> Although the given criterion is based on a yield phenomenon, extensive testing has shown that use of a "von Mises" stress is applicable at ultimate loading </P> <Dl> <Dd> M S u l t = F u σ v − 1 (\ displaystyle MS_ (ult) = (\ frac (F_ (u)) (\ sigma _ (v))) - 1) </Dd> </Dl> <Dd> M S u l t = F u σ v − 1 (\ displaystyle MS_ (ult) = (\ frac (F_ (u)) (\ sigma _ (v))) - 1) </Dd>

What is the different between shear stress torsion stress and yield stress