J integral solution for semi-elliptical surface crack in high density poly-ethylene pipe under bending

Benhamena, Ali; Aminallah, L.; Bouiadjra, B. Bachir; Benguediab, M.; Amrouche, Abdelwaheb; Benseddiq, Noureddine

doi:10.1016/j.matdes.2011.01.045

Cited by 28 publications

(14 citation statements)

References 33 publications

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“…The crack shape was an arc of a circle that was characterized by its depth, a, and its length, c, (Figure ). Two‐plane symmetry is here exploited to further reduce the finite element model (FEM) to a quarter of the original structure …”

Section: Numerical Model Based On Finite Element Methodsmentioning

confidence: 99%

Structural integrity analysis of HDPE pipes for water supplying network

Bouaziz

Guidara

Schmitt

et al. 2018

Fatigue Fract Eng Mat Struct

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A problem of reliability of polymer pipes manufactured with the high‐density polyethylene (HDPE) for drinking water supply was considered. The safety of the pipelines network was analyzed with taking into account two main factors: arising of sudden overpressure (water hammer phenomenon) and presence of defects on pipe surface. Based on elastoplastic fracture mechanics and using of J‐integral approach, the numerical model of cracked pipe was developed and verified by direct experimental test. The formula for calculation of crack initiation pressure, which is the function of pipe size and size of external surface defect, was derived. The validity of this relation was proved for pipes of diameter 450 to 800 mm. It was also shown that the pressure peaks of the water hammer phenomenon are quickly damped because of the high deformability of the polyethylene pipes and the defect depth that is equivalent to 40% of pipe wall thickness can be considered as acceptable. The applicability of developed tools was demonstrated under analysis in the real state of South Tunisian water supply network.

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Section: Numerical Model Based On Finite Element Methodsmentioning

confidence: 99%

Structural integrity analysis of HDPE pipes for water supplying network

Bouaziz

Guidara

Schmitt

et al. 2018

Fatigue Fract Eng Mat Struct

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show abstract

“…Normally, the fracture behavior (the initiation and propagation of cracks) must be analyzed using the concept of viscoelastic-plastic fracture mechanics (Brostow et al 1991) and (Favier et al 2002). However, it has been shown (Benhamena et al 2010(Benhamena et al , 2011) that elastic-plastic approaches can approximate with acceptable accuracy the critical J integral of the polyethylene.…”

Section: Fig 6 3d Crack Meshmentioning

confidence: 99%

Burst Test and J-Integral Crack Growth Criterion in High Density Poly-Ethylene Pipe Subjected to Internal Pressure

Guidara

Bouaziz

Schmitt

et al. 2015

Applied Condition Monitoring

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Abstract. In the present work we are interested on the analysis of the severity of crack defects created by a disc cutter and to study the behavior of a high density polyethylene pipe (HDPE pipe) when subjected to an internal pressure, either in the absence or presence of a pre-crack. In order to do this, experimental tests was performed to measure the toughness and to determine the mechanical behavior of HDPE. These features were used to perform numerical simulations using ABAQUS on pipe solicited by an increase in internal pressure. This allows to compare with burst tests of cracked pipes and to determine the fracture energy that will be compared to the toughness.The results show that the crack is initiated in the radial direction. And the size of the crack has a great influence on the energy of rupture and consequently on the ultimate pressure. There is a good agreement between experimental and numerical results.

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“…For this kind of materials, the viscoelastic-plastic fracture mechanics concept is recommended to analyze the fracture behavior (the initiation and propagation of cracks) [30,31]. Benhamena et al [13,14], however, showed that elastic-plastic approaches can approximate the critical J-integral of the polyethylene with acceptable accuracy.…”

Section: Figure133d Pre-cracked Pipe Meshmentioning

confidence: 99%

“…Benhamena et al [13,14] analyze the severity of semi-elliptical crack defects located in different positions in the wall of a poly-ethylene pipe using the three finite element method based on the computation of the J-integral. The effect of the position, shape, and size of the crack on the J-integral was highlighted.…”

Section: Introductionmentioning

confidence: 99%