proof stress


Also found in: Dictionary, Acronyms, Wikipedia.

proof stress

[′prüf ‚stres]
(mechanics)
The stress that causes a specified amount of permanent deformation in a material.
A specified stress to be applied to a member or structure in order to assess its ability to support service loads.

proof stress

A stress, either compression or tension, which is applied to a material to determine the magnitude required to produce a specified permanent deformation usually specified as a percentage of the original length.
References in periodicals archive ?
In both alloys, the longer the exposure time, the lower the elongation and reduction of area became while showing a slight increase in the proof stress.