The theory of the S-N fatigue damage envelope: Generalization of linear, double-linear, and non-linear fatigue damage models

Comparative Analysis of Methods for Determining Cyclic Properties of Metals

“…The material data determined using the simplified method can be used repeatedly when calculating fatigue life [11]. It means, that even the slightest differences in ∆W pl energy obtained from calculations and tests may lead to accumulation of small differences and thus to significant differences between the results obtained from calculations and tests.…”

Fatigue Design Challenges in Aerospace Industry: Recent Linear and Nonlinear Models

“…A recent advance in fatigue crack initiation modelling is based on the proposal that the area bounded by the S and N axes and the S-N curve can provide a damage map for the material [32].…”

“…In the present work, the new crack initiation theory of the S-N fatigue damage envelope [32], developed by the author, will be implemented on Al-2024 specimens subjected to high-low (H-L) and low-high (L-H) two-stage loading. Moreover, the overload-induced crack growth retardation model [26,27,33,34] based on strain hardening, will be improved to take into account both overload and underload effects.…”

Parametric probabilistic approach for cumulative fatigue damage using double linear damage rule considering limited data

“…Many authors [5,[12][13][14] have justified the application of DLDR to solve non-linear damage accumulation problems under multi-amplitude loading conditions based on the accurate predictions obtained with a relatively simple mathematical formulation since it requires the determination of only one knee-point. More sophisticated generalized non-linear CFD models have been proposed recently [15], which are computationally demanding and more difficult to be implemented in a probabilistic context.Although most of the above-mentioned CFD approaches are essentially deterministic models, experimental studies have been shown a considerable scattering of the fatigue life for a wide range of materials and loading conditions, revealing the stochastic nature of the cumulative fatigue damage [16].…”