Original scientific paper

Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure

Ivana Dimić ; Innovation Center of the Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia
Miodrag Arsić ; Institute for Testing of Materials - IMS, Bulevar vojvode Mišića 43, 11000 Belgrade, Serbia
Bojan Međo ; University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia
Ana Stefanović ; JAT Tehnika, Airport "Nikola Tesla", 11180 Belgrade, Serbia
Vencislav Grabulov ; Institute for Testing of Materials - IMS, Bulevar vojvode Mišića 43, 11000 Belgrade, Serbia
Marko Rakin orcid.org/0000-0002-3965-0380 ; University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia

Abstract

Since local defects reduce the load-carrying capacity and deformation ability of a piping system, an analysis is undertaken to quantify the influence of weld defects on integrity of the pipe elbows subjected to internal pressure. Incompletely filled groove is examined, because this type of defect was previously detected by ultrasonic measurement on the inner surface of the pipeline from a hydro-power plant. Three-dimensional finite element analysis is conducted using Abaqus software package. The influence of weld defect geometry (its depth, length and location) on the elbow integrity is determined. Additionally, decrease of load carrying capacity is determined for the case when a crack has initiated at the bottom of the defect. The influence of finite element type (hexahedral or tetrahedral) is examined.

Keywords

elbow; finite element method; incompletely filled groove; pipe; structural integrity; welded joint

Hrčak ID:

100248

URI

https://hrcak.srce.hr/100248

Publication date:

15.4.2013.

Article data in other languages: croatian

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