Investigation on fatigue damage calibration factors in offshore structures

• Tipo: Artigo em Revista Científica Internacional
• Data: 2021

Autores

Shabakhty, N (Autor) Outra; Haselibozchaloee, D (Autor) Outra; Correia, JAFO (Autor) FEUP

Revista

Título: Proceedings of the Institution of Civil Engineers: Maritime Engineering

Vol. 174 Nº 1

Páginas: 65-80

ISSN: 1741-7597

Editora: Thomas Telford Services Ltd.

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-00V-FG9

DOI: 10.1680/jmaen.2020.17

Abstract (EN): Fatigue damage in marine structures is generally assessed by means of stress-number of cycles (S-N) curves. These curves are obtained from many experimental tests on structural components. Fracture mechanics (FM), using the crack propagation method is also a practical technique. In this approach, fatigue damage is estimated based on crack propagation from an initial crack size through the surface and depth of structural members. In this paper, S-N curves based on FM were compared with S-N curves obtained following two standards: DNVGL-RP-C203 and API-RP2A-WSD. The results showed that the curves did not agree well. Therefore, to obtain better fitting, calibration factors are needed. From S-N curves established for two stages, two calibration factors - alpha(1) ( for the first stage) and alpha(2) (for the second stage) - are proposed for fitting S-N curves based on the FM approach with the DNV GL and the API S-N curves. The wall thickness, the initial crack depth and the critical crack depth were found to have a significant effect on determination of the calibration factors.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16