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Unified two-stage fatigue methodology based on a probabilistic damage model applied to structural details

Abstract: Fatigue cracks are often a result of incremental stable crack growths that can be described by fracture mechanics. Fatigue crack initiation, however, has been most often described using empirical relationships between an alternating stress or strain and the number of cycles at those loads until either a specimen fails or a crack is observed. There are, however, modern views that consider fatigue crack growth and crack initiation directly related phenomena, the former being repeated instances of the latter, localized at an existing crack tip. Models of this newer class allow for an integrated initiation and crack growth calculation process which is advantageous when dealing with notched details in elastoplastic strain conditions. Recently, Huffman developed such a model which relates Walker-like stress-life relation and fatigue crack growth behaviour. This paper expands upon this new approach in order to account for the expected statistical variation using probabilistic S-N and ?-N fields as per works of Castillo and Fernandez-Canteli. A unified local approach proposed to treat fatigue crack initiation and growth is used on notched geometries with the predicted probabilistic variations being accounted. Notched details made of puddle iron from the Eiffel bridge and P355NL1 pressure vessel steel are considered in this study.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Theoretical and Applied Fracture Mechanics Volume 92, December 2017, Pages 252-265

Editorial: Elsevier

 Fecha de publicación: 01/12/2017

Nº de páginas: 14

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.tafmec.2017.09.004

ISSN: 0167-8442,1872-7638

Url de la publicación: https://doi.org/10.1016/j.tafmec.2017.09.004

Autoría

CORREIA, J.A.F.O

HUFFMAN, P.J.

DE JESUS, A.M.P.

FERNÁNDEZ-CANTELI, A.

BERTO, F.

GLINKA, G.