Abstract
The good management of drinking water begins with a supply network, with a low rate of leakage. Currently, the pipes used in the water transport system are mainly made of polymeric materials, such as HDPE. The corrosion degradation of this type of pipe has received a lot of attention from the drinking water supply companies. It is therefore important to understand the effect of pressure on an HDPE pipe with a surface defect. To answer this problem, we will first study the mechanical behavior at failure of HDPE pipes in the presence of a surface defect using a finite element method. For the rehabilitation of pipe in presence of surface defect, we try to use a new composite. This new laminated composite is reinforced with a natural organic load. It is obtained from a laminated composite woven by incorporating a natural non-polluting organic load (granulates of date cores) which becomes hybrid composite. The new economical hybrid composite material is made of an organic matrix containing methyl methacrylate, a woven reinforcement including a reinforcing glass fiber and a fabric perlon having an absorbing role. The textile reinforcement made up of several folds reinforcing laid out according to the orientations (90, 452, and 0). A numerical simulation with the ANSYS Workbench software is carry out to study the behavior of the HDPE pipe with surface defect and with defect repaired by the new hybrid composite material in the form of rings to consolidate the cracked area of the tube. The numerical results will allow us to decide on a real practical use of the new hybrid composite.
Highlights
T oday, the deterioration of underground drinking water supply pipes has become a growing concern of industrial and environmental sectors
The pipes used in the water transport system are mainly made of polymeric materials, such as HDPE
A numerical simulation with the ANSYS Workbench software is carried out to study the behavior of the HDPE pipe with surface defect and with defect repaired by the new hybrid composite material in the form of rings to consolidate the cracked area of the tube
Summary
T oday, the deterioration of underground drinking water supply pipes has become a growing concern of industrial and environmental sectors. Leaks caused by the rupture of pipes, a fairly common phenomenon in urban areas, are initiated by a corrosion or other defects The severity of these phenomena depends on several parameters including the nature of the material of the pipes. The corrosion degradation of this type of pipe has received a great deal of attention from drinking water supply companies and from producers of these materials. The soil where these pipes are located is a favorable environment which accentuates all types of defects despite the protection of these pipes.
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