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Title: Determination of stress intensity factors along cracked surfaces in piping elbows structures
Authors: Fonseca, E.M.M.
Melo, F.J.M.Q. de
Valente, R.A.F.
Issue Date: 2006
Citation: Fonseca, E.M.M.; Melo, F.J.M.Q. de ; Valente, R.A.F. (2006) - Determination of stress intensity factors along cracked surfaces in piping elbows structures. In 10th Portuguese Conference on Fracture. Guimarães.
Abstract: Piping elbows represent an essential role in pipework systems. These structures are part of the plant process in all industries. High safety standards in design are inherent to these projects due to complex mechanical or thermal loading. When these accessories carry defects, project engineers should assess their integrity in duty. This paper present a contribution in fracture mechanics applied to piping systems. Stress intensity factors are determined along cracked surfaces in piping elbows subjected to bending moment using a developed finite curved pipe element. This element is based in high order polynomial and trigonometric functions for rigid beam displacement and Fourier series modelling the transverse section warping or ovalization. Computational effort is saved with this element in the evaluation of the stresses or strains. Numerical tests are performed for different standard pipe elbows containing an axial or longitudinal crack. This study is compared with analyses reported by other authors.
Appears in Collections:DMA - Resumos em Proceedings Não Indexados ao ISI/Scopus

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