Issue 42

P. J. Huffman et alii, Frattura ed Integrità Strutturale, 42 (2017) 74-84; DOI: 10.3221/IGF-ESIS.42.09 74 Focused on Mechanical Fatigue of Metals Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model P. J. Huffman John Deere, One John Deere Place, Moline, IL 61265, USA huffman.peter.j@gmail.com J. Ferreira, J.A.F.O. Correia, A.M.P. De Jesus INEGI, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal em12236@fe.up.pt, jacorreia@inegi.up.pt, ajesus@fe.up.pt http://orcid.org/0000-0002-4148-9426 , http://orcid.org/0000-0002-1059-715X G. Lesiuk Faculty of Mechanical Engineering, Department of Mechanics, Material Science and Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland Grzegorz.Lesiuk@pwr.edu.pl, https://orcid.org/0000-0003-3553-6107 F. Berto Department of Industrial and Mechanical Design, Norwegian University of Science and Technology, Norway berto@gest.unipd.it, filippo.berto@ntnu.no , http://orcid.org/0000-0002-4207-0109, http://orcid.org/0000-0002-0591-0754 A. Fernández-Canteli Department of Construction and Manufacturing Engineering, Univ. of Oviedo, 33203 Gijón, Spain afc@uniovi.es , http://orcid.org/0000-0001-8071-9223 G. Glinka Department of Mechanical Engineering, University of Waterloo, 200 Univ. Avenue West, Waterloo, ON, 2L 3G1, Canada gggreg@uwaterloo.ca, http://orcid.org/0000-0001-8452-8803 A BSTRACT . 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 σ ar =(σ amp ) γ ·(σ max ) (1-γ) , which is Citation: Huffman, P.J., Ferreira, J., Correia, J.A.F.O., De Jesus, A.M.J., Lesiuk, G., Berto, F., Glinka, G., Fernández-Canteli, A., Fatigue crack propagation prediction of a pressure vessel mild steel based on a strain energy density model, Frattura ed Integrità Strutturale, 42 (2017) 74-84. Received: 16.06.2017