Issue 40

I. Stavrakas, Frattura ed Integrità Strutturale, 40 (2017) 32-40; DOI: 10.3221/IGF-ESIS.40.03 34 in a computer using a GPIB interface. The sensing system consisted of a pair of gold plated electrodes, installed in the middle of the specimen’s height (see Fig. 3), enabling the collection of electric emissions as close as possible to any potential source of electric current (or equivalently to any point where damage occurs). Further details on the monitoring of the ΑΕ and PSC are described in earlier papers [22, 23]. Figure 1 : Temporal variation of the mechanical stress (black line), and the corresponding behaviour of the mechanical strain (gray line) during the complete cyclic loading. Figure 2 : The stress-strain behaviour during the two loading / unloading loops as well as the final loading during which the specimen failed.