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Book Section Year : 2018

HDPE Pipe Failure Analysis Under Overpressure in Presence of Defect

Abstract

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 and versions

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

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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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