Appl. Mech., Volume 1, Issue 4 (December 2020) – 2 articles
Cover Story (view full-size image): The fatigue lifetime of offshore pipelines with semi-elliptical circumferential surface cracks is often underestimated. An accurate prediction of the pipeline structural integrity is important in order to prevent unnecessary and expensive downtime and ultimately improve the reliability of the pipeline. The estimation of fatigue crack growth in pipelines is highly dependent on the calculation of crack driving parameters, such as the stress intensity factor and the 3D J-integral. This paper presents a numerical study to predict the fatigue lifetime of cracks in offshore pipes, determining the J-integral that includes first and second derivatives of the displacement field obtained by finite element method (FEM) for pipes containing a range of circumferential internal and external surface cracks. View this paper
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