Issue 50

M. Papachristoforou et alii, Frattura ed Integrità Strutturale, 50 (2019) 526-536; DOI: 10.3221/IGF-ESIS.50.44 532 y = -0.0082x + 26.01 R² = 0.403 y = -0.0044x + 20.654 R² = 0.619 12 17 22 27 32 0 500 1000 1500 Expansion (mm) Yield stress (Pa) 830 kg/m3 500 kg/m3 Figure 4 : Yield stress versus expansion along with printable window (blue area). y = -0.1528x + 121.82 R² = 0.9288 y = -0.0491x + 54.836 R² = 0.7645 12 17 22 27 32 580 680 780 880 Expansion (mm) Power consumption (W) 830 kg/m3 500 kg/m3 Figure 5 : Power consumption of screw extruder motor versus expansion along with printable window (blue area). Figure 6 : Difference on printing quality due to different workability of the same mixture 0 (left) and 15 minutes (right)after mixing.