Fatigue Life Prediction and Damage Modelling of High-density Polyethylene under Constant and Two-block Loading

Djebli, Abdelkader; Bendouba, M.; Aid, A.; Talha, Abderrahim; Benseddiq, Noureddine; Benguediab, M.

doi:10.1016/j.proeng.2015.02.002

Cited by 7 publications

(3 citation statements)

References 9 publications

(6 reference statements)

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“…The slope of the cyclic failure curve is -0.039 which is much lower than that of the brittle region under constant pressure condition. Abdelkader, et al [12,13] performed uniaxial fatigue tests on un-notched tensile specimens taken from the HDPE pipe and obtained slope values of -0.068 and -0.073. The discrepancy of the slope values may be caused by the test material and test conditions such as frequency and test setup.…”

Section: Resultsmentioning

confidence: 99%

A New Test Setup for Testing Polyethylene Tubes Under Constant and Cyclic Internal Pressures

Vahidi

Schruba

Sun

et al. 2018

Plastics Engineering

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A test system was designed to evaluate the failure behavior of a thin-wall small-diameter polyethylene tube under internal pressure. The test setup was capable of delivering constant (static) and cyclic (dynamic) pressure patterns as well as maintaining an elevated testing temperature to accelerate the failure. Desired pressure patterns were obtained by controlling the opening/closing duration of the solenoid valves accordingly. A water-sensing system was used to detect the failure time, particularly for small brittle failure. A data acquisition system based on LabView™ was used to control and record the applied pressures and the failure times. The constant pressure tests were performed at 65 and 75⁰C and the cyclic pressure tests were performed at 75⁰C. The test data obtained from the constant pressure tests exhibited two distinguishable linear regions in a log-log plot of hoop stress versus failure time. Slope values of -0.034 and -0.113 were obtained for ductile and brittle regions, respectively. A brittle failure curve with slope of -0.039 was obtained under the cyclic pressure testing condition. The slow crack growth (SCG) failure was considerably accelerated by the cyclic loading.

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Section: Resultsmentioning

confidence: 99%

A New Test Setup for Testing Polyethylene Tubes Under Constant and Cyclic Internal Pressures

Vahidi

Schruba

Sun

et al. 2018

Plastics Engineering

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“…It has become very common to find semi-crystalline polymers used in outdoor structural applications, such as solar cells, pipelines, and greenhouses, and in the automotive and aerospace industries, electrical insulation, and thermal energy storage applications. Such widespread use of these materials is explained by their good strength-to-weight ratio and their relatively low cost [1]. There are polymers with a large variety of molecular and supramolecular structures, but only two basic macromolecular arrangements can be distinguished: totally amorphous and semi-crystalline structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and modeling attempt on the effects of ultraviolet aging on the fatigue behavior of an LDPE semi-crystalline polymer

Lamnii

Nait-Abelaziz

Ayoub

et al. 2021

International Journal of Fatigue

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The objective of this study was to investigate the effect of UV irradiation on the fatigue life of a bulk semicrystalline polymer. Low-density polyethylene samples exposed to different UV irradiation doses were fatigue tested. Fatigue indicator based on dissipated energy per cycle was found to present the best correlation with the experimental fatigue results. A master curve unifying the experimental fatigue results for as-received and UVaged materials was obtained when subtracting the dissipated energy threshold from the total dissipated energy. Finally, the evolution of the damage with cyclic loading was analyzed and preliminary modeling was attempted.

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“…Besides, the long-term failure behavior of pressurized PE pipes has been well investigated based on internal pipe pressure tests as well as on field failure [1,4,6,11]. Also, the crack orientation (axial or circumferential) relative to the axis of the pipe and its location (internal or external) in the wall of pipe has a very significant effect on the crack growth and the failure of poly-ethylene pipe [12,13].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Fatigue Lifetime in PE100 Pipes

Medjadji¹,

Mazari²,

Kebir³

et al. 2019

JESA

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The fatigue lifetime predictions for semi-crystalline polymer, high density of polyethylene HDPE cases, is a new research problem, this work is focused on a simulation of the fatigue lifetime in PE100 pipes under internal pressure taking into account the influence of dimension parameters and internal pressures using the AFGROW software. Where, the developing numerical models gives an advantage of studying the problems more efficiently, since also very long-time processes can be simulated and analyzed in shorter times and different time frames of the process. The fracture m the service mechanics tools have been used to gain information on the resistance to crack growth. Furthermore, a fracture mechanics extrapolation procedure has been applied to predict the remaining fatigue lifetime of the pipes.

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Fatigue Life Prediction and Damage Modelling of High-density Polyethylene under Constant and Two-block Loading

Cited by 7 publications

References 9 publications

A New Test Setup for Testing Polyethylene Tubes Under Constant and Cyclic Internal Pressures

A New Test Setup for Testing Polyethylene Tubes Under Constant and Cyclic Internal Pressures

Experimental investigation and modeling attempt on the effects of ultraviolet aging on the fatigue behavior of an LDPE semi-crystalline polymer

Simulation Study of Fatigue Lifetime in PE100 Pipes

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