Issue 40

Z.S. Metaxa et al, Frattura ed Integrità Strutturale, 40 (2017) 61-73; DOI: 10.3221/IGF-ESIS.40.06 71 material. On the contrary, the surface attached version of the same fiber gave unsatisfactory results due to possible debonding / loss of coherency with the attaching medium. Figure 13 : Incremental loading – unloading loops in type I specimen with embedded coated PVA-CNT fiber for applied loadings up till: (a) 40 Ν, (b) 160 Ν, (c) 240 Ν, (d) 360 Ν, (e) 480 N and (f) 520 Ν (fracture). Figure 14 : Incremental loading – unloading loops in type II specimen with surface-attached coated and annealed PVA-CNT fiber for applied loadings up till: (a) 40 Ν, (b) 160 Ν, (c) 320 Ν, (d) 400 Ν, (e) 600 N and (f) 680 Ν.