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Chapitre D'ouvrage Année : 2018

HDPE Pipe Failure Analysis Under Overpressure in Presence of Defect

Résumé

Pipe failure and leaks are frequent phenomena in urban areas. In order to minimize the risk of long-term leakage, nearly 60% of drinking water systems are renewed with third-generation polyethylene pipes, PE100. Due to its characteristics, it is a material of choice for water supply networks. However, the presence of a defect can lead the pipe failure under the effect of transient flow. In order to examine this problem, the cracking behavior of PE100 pipes with a defect has been studied. Using burst tests and finite element modeling, we have demonstrated that the concept of elastic-plastic fracture mechanics, the J-integral, can define with acceptable precision the crack initiation and the failure behavior of PE100 pipe. The J-integral value at the time of appearance of the damage zone, plastic strain-hardening, is considered numerically to be the value of the toughness. This allowed us to define the pressure leading to the crack initiation. The results are compared with the experimental burst pressures.
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Dates et versions

hal-03172487 , version 1 (17-03-2021)

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Citer

M. A. Guidara, M. A. Bouaziz, M. Dallali, C. Schmitt, E. Haj Taieb, et al.. HDPE Pipe Failure Analysis Under Overpressure in Presence of Defect. Lecture Notes in Mechanical Engineering, 2018, pp.1027-1038, 2018, 978-3-319-66696-9. ⟨10.1007/978-3-319-66697-6_101⟩. ⟨hal-03172487⟩
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