THEORETICAL CONSIDERATION ABOUT EXPERIMENTAL FORMULA OF CREEP

Abstract

Creep is considered to appear as the result of deformation of crystal grains and movements at crystal boundaries; but, as the effect of the latter is secondary and its theore- tical treatment is very difficult, it may be disregarded in the first approximation.
In this report, adopting the effect of dislocation in crystal in qualitative meaning, the author defines the rate of work-hardening as the mutual reaction of dislocations and represents the usual experimental formula of creep as the function of stress and rate of work-hardening. He discusses the stationary state of creep as the application of this theory, and describes the rapid method of measuring the creep rate of the stationary state.