P. J. Huffman J. Ferreira J.A.F.O. Correia http://orcid.org/0000-0002-4148-9426 A.M.P. De Jesus http://orcid.org/0000-0002-1059-715X G. Lesiuk https://orcid.org/0000-0003-3553-6107 F. Berto http://orcid.org/0000-0002-4207-0109 A. Fernandez-Canteli http://orcid.org/0000-0001-8071-9223 G. Glinka http://orcid.org/0000-0001-8452-8803


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 ?ar=(?amp)?·(?max )(1-?), which is dependent on the cyclic stress-strain behaviour of the material. This new fatigue crack propagation model was proposed by Huffman based on Walkerlike 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.


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    How to Cite

    Huffman, P. J., Ferreira, J., Correia, J., De Jesus, A., Lesiuk, G., Berto, F., Fernandez-Canteli, A. and Glinka, G. (2017) “Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model”, Frattura ed Integrità Strutturale, 11(42), pp. Pages 74–84. doi: 10.3221/IGF-ESIS.42.09.

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