Issue 70

O. Neimark et alii, Frattura ed Integrità Strutturale, 70 (2024) 272-285; DOI: 10.3221/IGF-ESIS.70.16

[25] Pérez-Mora, R., Palin-Luc, T., Bathias, C., Paris, P.C. (2015). Very high cycle fatigue of a high strength steel under sea water corrosion: A strong corrosion and mechanical damage coupling, International Journal of Fatigue, 74, pp. 156 165. DOI: 10.1016/j.ijfatigue.2015.01.004

N OMENCLATURE

N

: Number of cycles; : Crack length; : Stress intensity factor;

a

K I

Δ K K max ∆ K th

: Range of stress intensity factor;

: Stress intensity value at maximum applied stress;

: Crack propagation threshold;

K c C

: Fracture toughness;

: Scaling parameter;  ,m,n : Experimentally determined constants; σ y : Yield strength; K 1c : Fracture toughness; σ u : Tensile strength; E : Young’s modulus; L : Length scale; Z : Similarity parameter; r y : Plastic-zone size; U : Energy of elastic materials; γ : Surface energy; σ : Applied stress; θ : Coordinates of point; p ik : Defect density tensor;  : Structural scaling parameter; F(p, σ ) : Free energy for uniaxial case; A, B, C, D : Positive material parameters; χ : Nonlocality coefficient; lsc

: Scale related to the correlated behavior in the ensemble of defects;

L pz

: Scale associated with the process zone;

b

: Burgers vector; : Correlation function; : Hurst exponent; : Surface relief height; : Size of window;

C(r)

H

z(x)

r



: Poisson’s ratio;

A 0

: Amplitude of oscillations;

w Y

: Specimen width; : Polynomial factor;

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