yeild criterion
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7/30/2019 Yeild Criterion
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4.3 Yield Criteria
Cannot perform tests for all combinations of 3Dloading so we need yield criterion to generalize
from small number of tests. What are the ideal properties of a 3D yield
criterion?
We usually visualize yield criterion by a surfacein principal stress space. Why?
We also calculate effectivestress to comparewith yield stress.
( )
( )
ij
ij
f ,Y 0 Elastic Behavior
f ,Y 0 Onset of Inelastic Behavior