Issue 29

G. Carta et alii, Frattura ed Integrità Strutturale, 29 (2014) 28-36; DOI: 10.3221/IGF-ESIS.29.04 34 Figure 5 : Theoretical (solid lines) and numerical (dots) dispersion curves for cracked and undamaged solids with l = 1.5 m ( (a) , (b) ), l = 3 m ( (c) , (d) ) and l = 6 m ( (e) , (f) ). The other quantities have the following values: h = 0.3 m, s = 0.1 m, b = 0.5 m, E = 31 GPa, ν = 0.2, ρ = 2500 kg/m 3 . cracked - l / h = 5 cracked - l / h = 10 cracked - l / h = 20 undamaged - l / h = 5 undamaged - l / h = 10 undamaged - l / h = 20 (a) (b) (c) (d) (e) (f) ϕ kl kl kl kl kl kl ϕ ϕ ϕ ϕ ϕ