Effect of Water Hammer on Bent Pipes in the Presence of a Pre-crack

978-3-319-17527-0Un autre article paru dans la revue « Design and Modeling of Mechanical Systems de mars 2015.

In this study, transient pressure in piped liquid due to waterhammer is a function of structural restraint at elbows. To study the effect of this phenomenon on polyethylene elbowed pipe networks, experimental tests were performed on polyethylene bent pipes, either in the absence or presence of a pre-crack by measuring the toughness and determining the mechanical behavior of HDPE. These characteristics were been used to perform simulations using ABAQUS software, the internal pressure increase, to investigate the safety of bent pipes using an angle of 90 ° bend with 11.4 mm thickness and a right portion of 150 mm as length

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Failure Analysis of HDPE Pipe for Drinking Water Distribution and Transmission

Un article paru dans la revue « Design and Modeling of Mechanical Systems » de mars 2015.

« Pipes and elbows are important components in any piping systems for transportation of water. These structures are subjected to complex loads taking into account their geometrical configuration and the multiplicity of the loading conditions in service. The origin of failure of these mechanical components is directly related to the presence of defects. The principal objective of this work is to analyze the severity of defects on high density poly-ethylene pipe widely used for water piping networks. »

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Assessment of a gouge and dent defect in a pipeline

This paper pubished in Engineering Failure Analysis, deals with A37 steel pipelines containing a gouge and dent defect. The influence of the dent depth on the burst pressure of pipelines is evaluated for a given geometry of the gouge. Experimental burst tests are performed and finite element analysis is used in order to compare the numerical and experimental results. Experimental results showed that a combined gouge and dent defect does not reduce the burst pressure of A37 steel pipelines. These results contradict established research conclusions and the bulk of the literature on the subject. A combined criterion based on volumetric method and stress triaxiality is proposed for assessment of pipelines containing a gouge and dent defect.