Issue 39

A. Risitano et alii, Frattura ed Integrità Strutturale, 39 (2017) 202-215; DOI: 10.3221/IGF-ESIS.39.20 208 Figure 3: IR domain. From the N x M area (N: number of columns; M: number of lines) for all tests, square subdomains defined by 4 x 4 pixels were selected and were separated from each other by 5 pixels; during the extrapolation phase a set of points was used rather than a single pixel. As mentioned above, the average strain speed was ~9.1  10 4 s -1 and being the spatial resolution of 0.4, the pixel's displacements were negligible. For each specimen, the temperature trends and the dissipative energy trend were examined (Fig. 6).