Versetzungsbedingte amplitudenabhängige Relaxationsdämpfung

Abstract

The activation processes of gliding dislocations during plastic deformation of solids should lead to amplitude dependent internal friction even in the case of small oscillatory dislocation movements about the equilibrium positions.

Our theory predicts, that the rise of internal friction with amplitude should be the beginning of a maximum of internal friction, which one could find at higher amplitudes.

It is found that this theory can account qualitatively for the main features of many experiments on amplitude dependent internal friction, although this kind of damping has seldom been measured without the backgroundaction of pinning impurities.