Issue 42

M. Peron et alii, Frattura ed Integrità Strutturale, 42 (2017) 205-213; DOI: 10.3221/IGF-ESIS.42.22 213 [36] Meneghetti, G., Campagnolo, A., Berto, F., Atzori, B., Averaged strain energy density evaluated rapidly from the singular peak stresses by FEM: cracked components under mixed-mode (I+II) loading, Theor. Appl. Fract. Mech., 79 (2015) 113–124. [37] Gallo, P., Berto, F., Glinka, G Generalized approach to estimation of strains and stresses at blunt V-notches under non-localized creep, Fatigue Fract. Eng. Mater. Struct, 39 (2016) 292-306. N OMENCLATURE 2 α notch opening angle γ supplementary angle of α: γ = π – α ν Poisson’s ratio Δ σ stress range Δ σ A fatigue strength in terms of stress range at N A cycles Δ K 1,2,3 mode 1, 2 and 3 notch stress intensity factor range Δ K 1 A fatigue strength in terms of notch stress intensity factor range at N A cycles W  averaged strain energy density (SED) C W  critical value of the SED range λ 1,2,3 mode 1, 2 and 3 Williams’ eigenvalues E Young’s modulus e 1,2,3 mode 1, 2 and 3 functions in the SED expression f frequency K 1,2,3 mode 1, 2 and 3 notch stress intensity factor (NSIF) k inverse slope of the Wöhler curve N number of cycles Ps survival probability R load cycle ratio R 0 radius of the control volume for the calculation of the averaged SED value T σ scatter index referred to the stress range T W scatter index referred to the SED range