Open AccessCrack growth around stress concentrations in pipes and tubes
Author(s) -
Koen Loncke,
Wim De Waele,
Jeroen Van Wittenberghe,
Timothy Galle,
Patrick De Baets
Publication year - 2012
Publication title -
sustainable construction and design
Language(s) - English
Resource type - Journals
eISSN - 2295-9092
pISSN - 2032-7471
DOI - 10.21825/scad.v3i1.20557
Subject(s) - stress intensity factor , deflection (physics) , paris' law , structural engineering , fracture mechanics , bending , materials science , stress concentration , mechanics , stress (linguistics) , energy method , crack closure , engineering , physics , classical mechanics , linguistics , philosophy
Fatigue crack growth behaviour in pipes fundamentally differs from fatigue growth in shafts andflat plates. The aim of this paper is to give a better understanding of this phenomenon. In a first part of thepaper, the general principles of the fracture mechanics are concisely described. The energy approach aswell as the stress intensity factor (SIF) approach are explained. An analytical method, a numeric method aswell as an experimental method to determine the SIF are discussed. Special attention is given to theexperimental method. A theoretical model predicting the deflection of a pipe tested in a resonant bendingtest setup is evaluated and compared to experimental measured deflections. Several methods to measurethe crack growth in a pipe during and after a fatigue bending test are discussed. In addition, an overview isgiven of results obtained by other authors in the field of fatigue crack growth behaviour of pipes.