Issue 51

K. Bahram et alii, Frattura ed Integrità Strutturale, 51 (2020) 467-476; DOI: 10.3221/IGF-ESIS.51.35 476 min eff K : Effective minimum stress intensity factor. min K : Minimal values of the stress intensity factor during a cycle. max K : Maximum values of the stress intensity factor during a cycle. 0 a : Crack length. 0 a : Initial crack length. i a : crack length. ,  C n : Material constants of fatigue crack growth. / da dN : Fatigue crack growth rate. / max da dN : Maximum speed / da dN after applying the overload. / min da dN : Minimum speed / da dN after applying the overload.  : Describes the state of constraint. pic K : Maximum value of stress intensity factor at the application of overload. crit K : critical stress intensity factor. pic R : Maximum value of load ratio at the application of overload. eq R : Size of the equivalent plastic zone eff K  : Effective stress intensity factor range K  : Stress intensity factor range R K : Residual stress intensity factor due to overload  : The level of residual stress induced by application of overload 0 TH K  : The threshold stress intensity factor for a load ratio 0 R  crit SOR   : Critical value of the overload rate resulting in a stop of the propagation of the crack. max P : Maximum load min P : Minimum load E : Young's modulus  : Deformation. τ : overload rate.