Issue 50

I. Stavrakas et alii, Frattura ed Integrità Strutturale, 50 (2019) 573-583; DOI: 10.3221/IGF-ESIS.50.48 578 Figure 4 : Time variation of the axial stress and the axial strain (a, g) and the corresponding behaviour of the electrical current emissions, as recorded by the PSC channels 0-4 (b-f, h- l ), for the first (left column) and the second (right column) loading loops. PSC channel0 x-locaƟon:10mm (b) 75 50 25 0 PSC [pA] 0 50 100 150 200 t [s] PSC channel 0 x-location: 10 mm (b) PSC channel1 x-locaƟon:30mm (c) 75 50 25 0 PSC [pA] 0 50 100 150 200 t [s] PSC channel 1 x-location: 30 m (c) PSC channel2 x-locaƟon:50mm (d) 75 50 25 0 PSC [pA] 0 50 100 150 200 t [s] PSC channel 2 x-location: 50 mm (d) PSC channel3 x-locaƟon:70mm (e) 75 50 25 0 PSC [pA] 0 50 100 150 200 t [s] PSC channel 3 x-location: 70 mm (e) PSC channel0 x-locaƟon:10mm (h) 75 50 25 0 0 40 80 120 160 t [s] (h) PSC channel 0 x-location: 10 mm PSC [pA] PSC channel1 x-locaƟon:30mm (i) 75 50 25 0 0 40 80 120 160 t [s] (i) PSC channel 1 x-location: 30 mm PSC [pA] PSC channel2 x-locaƟon:50mm (j) 75 50 25 0 0 40 80 120 160 t [s] (j) PSC channel 2 x-location: 50 mm PSC [pA] PSC channel3 x-locaƟon:70mm (k) 75 50 25 0 0 40 80 120 160 t [s] (k) PSC channel 3 x-location: 70 mm PSC [pA] PSC channel4 x-locaƟon:90mm (f) 75 50 25 0 PSC [pA] 0 50 100 150 200 t [s] PSC channel 4 x-location: 90 mm (f) PSC channel4 x-locaƟon:90mm (l) 75 50 25 0 0 40 80 120 160 t [s] (l) PSC channel 4 x-location: 90 mm PSC [pA] (a) 0 50 100 150 200 t [s] 1.6 0.8 0.0 1 st loading (g) 80 40 0 Stress [MPa] Strain [mstrain] (a) 75 50 25 0 Stress [MPa] 2.0 1.0 0.0 Strain [mstrain] 0 40 80 120 160 t [s] 2 nd loading (g) Stress Strain Stress Strain