A regression model for statistical assessment of fatigue strain- and stress lifetimes

A. Fernández-Canteli, E. Castillo, M. López-Aenlle, H. Pinto

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

In this work, a novel Weibull regression model, based on a former S N model developed by the authors, is proposed for the probabilistic definition of the N field as an alternative to the conventional Basquin-Coffin-Manson approach. The model arises from sound statistical and physical assumptions and, integrating the elastic and the plastic local strain, provides an analytical probabilistic definition of the whole strain-life field as quantile curves both in the low cycle and high cycle fatigue regions. The five parameters of the model can be estimated using different well established methods proposed in the fatigue literature, in particular, the maximum likelihood and the two-stage methods providing adequate estimates based on the set of experiments. Runouts, as a frequent case in fatigue testing, can be also dealt with. The model can be applied for probabilistic lifetime prediction using damage accumulation. Finally, the proposed N model is also used to derive the corresponding stress life curves, i.e. the probabilistic S N field that in this case presents the typical change in curvature in the low-cycle fatigue region.

Idioma originalInglés
Título de la publicación alojada17th European Conference on Fracture 2008
Subtítulo de la publicación alojadaMultilevel Approach to Fracture of Materials, Components and Structures
Páginas1840-1846
Número de páginas7
EstadoPublicada - 2008
Publicado de forma externa
Evento17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17 - Brno, República Checa
Duración: 2 sept. 20085 sept. 2008

Serie de la publicación

Nombre17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures
Volumen3

Conferencia

Conferencia17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
País/TerritorioRepública Checa
CiudadBrno
Período2/09/085/09/08

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