Yield Criterion
A yield criterion, often expressed as yield surface, or yield locus, is a hypothesis concerning the limit of elasticity under any combination of stresses. There are two interpretations of yield criterion: one is purely mathematical in taking a statistical approach while other models attempt to provide a justification based on established physical principles. Since stress and strain are tensor qualities they can be described on the basis of three principal directions, in the case of stress these are denoted by, and .
The following represent the most common yield criterion as applied to an isotropic material (uniform properties in all directions). Other equations have been proposed or are used in specialist situations.
Read more about this topic: Yield (engineering)
Famous quotes containing the words yield and/or criterion:
“A book should contain pure discoveries, glimpses of terra firma, though by shipwrecked mariners, and not the art of navigation by those who have never been out of sight of land. They must not yield wheat and potatoes, but must themselves be the unconstrained and natural harvest of their author’s lives.”
—Henry David Thoreau (1817–1862)
“I divide all literary works into two categories: Those I like and those I don’t like. No other criterion exists for me.”
—Anton Pavlovich Chekhov (1860–1904)