The elastic limit, or the point at which a material can no longer deform elastically. When the elastic limit is exceeded by an applied stress, permanent deformation occurs.

The stress limit at which permanent deformation takes place in a non-brittle material.

The point at which material permanently deforms during bending.

The stress in a material at which there occurs a marked increase in strain without an increase in stress during tensile testing.

The amount of stress under which a given material such as a rod of metal, will exhibit permanent deformation. The point at which a stress or strain exceeds the elastic strength of the material.

point at which the stress in a wire suddenly drops when the wire is subject to increasing strain

Maximum stress that can be applied before an object is permentantly deformed.

Is that unit stress at which the stress-strain curve exhibits a definite increase in strain without an increase in stress which is less than the maximum attainable stress.

The load per unit of original cross section at which, in soft steel, a marked increase in deformation occurs without increase in load.

The first stress in a material, less than the maximum attainable stress, at which an increase in stress. Not a general term or property; only certain metals exhibit a yield point.

That point beyond which the stresses applied to a material will cause permanent deformation.

In drilling-fluid terminology, yield point means yield value (which see). Of the two terms, yield point is more common.

Stress at which strain increases without accompanying increase in stress. Only a few materials (notably steel) have a yield point, and generally only under tension loading.

First stress in a material at which an increase in strain occurs, without an increase in stress, as defined by ASTM.