Issue 41

Ch. F. Markides et alii, Frattura ed Integrità Strutturale, 41 (2017) 396-411; DOI: 10.3221/IGF-ESIS.41.51 402 -0.0025 -0.0020 -0.0015 -0.0010 -0.0005 1 2 3 4 5 Normal astrain ε rr (along the loading axis) δ = E / E' ϕ o =0 o 15 o 30 o 45 o 60 o 75 o 90 o 0.0003 0.0006 0.0009 0.0012 1 2 3 4 5 Normal transverse strain ε θθ (perpendicular to the loading axis) δ = E / E' ϕ o =0 o 15 o 30 o 45 o 60 o 75 o 90 o Materials E [GPa] E ΄ [GPa] ν ΄ (= ν yx ) ν xy (<0.5) δ “Fictitious” isotropic 75 75 0.30 0.30 1 “Fictitious” “transtropic” 1 20 15 0.30 0.12 1.33 2 25 0.10 1.67 3 30 0.10 2.00 4 35 0.10 2.33 5 40 0.10 2.67 6 45 0.10 3.00 7 50 0.10 3.33 8 55 0.10 3.67 9 60 0.10 4.00 10 65 0.10 4.33 11 70 0.10 4.67 12 75 0.10 5.00 Table 1 : The mechanical properties of the materials considered. (a) (b) Figure 2 : The dependence of the normal radial ε rr (a) and transverse ε θθ (b) strain on the anisotropy ratio δ for a series of ϕ o -values.