Fracture mechanics defect assessment diagram on pipe from steel P264GH with a notch
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Fracture mechanics defect assessment diagram on pipe from steel P264GH with a notch H. Moustabchir • C. I. Pruncu • Z. Azari S. Hariri • I. Dmytrakh
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Received: 5 November 2014 / Accepted: 23 February 2015 Springer Science+Business Media Dordrecht 2015
Abstract The design for a pipeline component is considered a tough challenge once defects in the base material develop. To address this issue, we present a gouge defect located in a pipe submitted to internal pressure. This problem is often encountered in the field of pipeline network and boiler components because of structural imperfection. To simulate the activity of such pressurized pipeline, a longitudinal cylindrical shell under pressure from a material of steel P264GH were involved in the research. Secondly, by this paper we propose a safety methodology to detect the boundary of failure assessment diagram (FAD), as a new solution to predict the service life of pipeline products. The methodology is connected to the modified FAD approach, whereas the specific parameters were settled using the Volumetric Method calculation, based on the notch Stress Intensity Factor, determined in the elasto-plastic field. This new
modified FAD methodology entails an accurate solution, suitable to be used as expert tool for the assessment of workability and reliability of pipes network, in the case of corrosion defects presence.
H. Moustabchir E´quipe Science et Inge´nierie des Mate´riaux (ESIM), De´partement de Physique Faculte´ des Sciences et Techniques Errachidia, Universite´ My Ismaı¨l, BP 509 Boutalamine, 52000 Errachidia, Morocco
S. Hariri De´partement Technologie des Polyme`res et Composites and Inge´nierie Me´canique, Ecole des Mines de Douai 941, rue Charles Bourseul, B.P. 10838, 59508 Douai Cedex, France
C. I. Pruncu (&) School of Mechanical Engineering, University of Birmingham, Edgbaston B15 2TT, UK e-mail: [email protected]
I. Dmytrakh Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine, 5 Naukova Street, 79601 L’viv, Ukraine
Keywords Pipe Internal pressure Defect-notch Volumetric method Stress intensity factor Failure assessment diagram (FAD)
1 Introduction Pipelines network have been developed as one of the most practical and low price method for large oil and gas transport since 1950 (Hadj Meliani et al. 2010). The last research proves a strong tie between the pipeline failure and the amount of the compounds involved in these installations. A breach of pressure
Z. Azari LaBPS, Ecole Nationale d’Ingenieurs de Metz, Universite Paul Verlaine Metz, Ile du Saulcy, 57045 Metz, France
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boundary or structural integrity of structural elements can lead to disastrous consequences: fatality, environmental disaster, severe costs and penalties, and negative press with loss of shareholder returns. However, the failures of pressure vessels and piping components is rare due to improved awareness, better materials and manufacturing quality, and good compliance to modern codes and standards (Hollowa
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