Manufacturing Technology 2014, 14(1):116-122 | DOI: 10.21062/ujep/x.2014/a/1213-2489/MT/14/1/116

Finite Element Analysis of Crack Growth in Pipelines

Milan Žmindák, Jozef Meško, Zoran Pelagić, Andrej Zrak
Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 01026 Žilina. Slovak Republic

The paper presents a short crack theory together with the finite element method (FEM), which is used to model crack initiation during the operational phase of a pipeline. To simulate the crack, the virtual crack extension (VCE) method, implemented in the FE code, is used. This paper describes the modelling and simulation of a welded pipeline with initiated crack in the beginning. A FEM modelling procedure for analysing the stress intensity factors (SIF's) and J-integral for two practical problems is presented. For the first problem the commercial software ANSYS was used to calculate the crack parameters in a straight pipe with a radial crack. The second problem deals with an axial crack tip in the main pipe of a welded tubular Y-joint. For this problem numerical results for calculated crack parameters and contour integrals are presented. The parameters were calculated by commercial software ABAQUS. For J-integral evaluation, the region on the surface of the blunted notch should be used to define the crack front.

Keywords: FEM, XFEM, stress intensity factor, J-integral, pipelines

Published: March 1, 2014  Show citation

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Žmindák M, Meško J, Pelagić Z, Zrak A. Finite Element Analysis of Crack Growth in Pipelines. Manufacturing Technology. 2014;14(1):116-122. doi: 10.21062/ujep/x.2014/a/1213-2489/MT/14/1/116.
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