alternating stress การใช้

The definition of alternating stress varies between different sources.
Nearly all engineering structures experience some form of alternating stress, and are exposed to harmful environments during their service life.
The general trend given by the Goodman relation is one of decreasing fatigue life with increasing mean stress for a given level of alternating stress.
The relation can be plotted to determine the safe cyclic loading of a part; if the coordinate given by the mean stress and the alternating stress lies under the curve given by the relation, then the part will survive.
The crack-producing stresses of TIFF are twofold : i ) constant residual tensile stresses in the interior of the tooth due to case hardening; and ii ) alternating stresses due to the idler usage of the gear wheel.