Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Huffman, PJ (Author) Other; Ferreira, AJM (Author) FEUP; Correia, JAFO (Author) FEUP; Abilio M P De Jesus (Author) FEUP; Lesiuk, G (Author) Other; Berto, F (Author) Other; Fernandez Canteli, A (Author) Other; Glinka, G (Author) Other

Journal

Title: Frattura ed Integrita Strutturale

Vol. 11

Pages: 74-84

ISSN: 1971-8993

Publisher: Gruppo Italiano Frattura

Indexing

ISI Web of Knowledge - 28 Citations

Scopus - 28 Citations

Other information

Authenticus ID: P-00N-3P7

DOI: 10.3221/igf-esis.42.09

Abstract (EN): Fatigue crack growth (FCG) rates have traditionally been formulated from fracture mechanics, whereas fatigue crack initiation has been empirically described using stress-life or strain-life methods. More recently, there has been efforts towards the use of the local stress-strain and similitude concepts to formulate fatigue crack growth rates. A new model has been developed which derives stress-life, strain-life and fatigue crack growth rates from strain energy density concepts. This new model has the advantage to predict an intrinsic stress ratio effect of the form sigma(ar) = (sigma(amp))(gamma).(sigma(max))((1-gamma)), which is dependent on the cyclic stress-strain behaviour of the material. This new fatigue crack propagation model was proposed by Huffman based on Walker-like strain-life relation. This model is applied to FCG data available for the P355NL1 pressure vessel steel. A comparison of the experimental results and the Huffman crack propagation model is made.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11