The performance and causes of failure of polyethylene pipes subjected to constant and fluctuating internal pressure loadings

Barker, M. B.; Bowman, Jeremy; Bevis, M.

doi:10.1007/bf00551979

Cited by 77 publications

(25 citation statements)

References 7 publications

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“…The unwelded plain PE pipe specimens had a fatigue life approximately five times superior to the B/F joined specimens and an order of magnitude better than the E/F joined specimen. Figure 11 shows that the results obtained in this study agree well with other research (Ref [16][17][18][19]. It is apparent that at identical stress amplitudes, the unwelded plain and joined HDPE pipes used in this study show improved bending fatigue life over those obtained in earlier studies.…”

Section: Fatigue Behaviorsupporting

confidence: 94%

Influence of joining on the fatigue and fracture behavior of high density polyethylene pipe

Chen

Scavuzzo

Srivatsan

1997

J. of Materi Eng and Perform

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Polyethylene pipes have been used in a spectrum of corrosion-critical applications, including distribution systems for oil, gas, water, and chemicals. In this paper, the influence of joining on bending fatigue and fracture behavior of high density polyethylene pipe is presented and discussed, and performance is compared with a plain unwelded counterpart. High density polyethylene pipes were joined using electrofusion and butt-fusion techniques. Stiffness and strength of the electro-fusion joined pipe was far inferior to the butt-fusion and the plain unwelded pipe. Tensile failure of the butt-fusion joined specimen occurred at the fusion zone, while tensile failure of the electro-fusion joined pipe specimen occurred at the fusion joint. Bending fatigue resistance, quantified in terms of life to failure, of the pressurized pipe was superior to that of the unpressurized pipe. The fatigue resistance of the butt-fusion joined specimen was superior to that of the electro-fusion joined pipe specimen. The unwelded plain polyethylene pipe had bending fatigue resistance superior to that of the butt-fusion joined counterpart. Rationale for the differences observed in bending fatigue life is presented, and intrinsic differences in failure characteristics are highlighted.

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Section: Fatigue Behaviorsupporting

confidence: 94%

Influence of joining on the fatigue and fracture behavior of high density polyethylene pipe

Chen

Scavuzzo

Srivatsan

1997

J. of Materi Eng and Perform

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“…Crack driving force: pR = J1 -Process zone driving force: Model of the process zone as a phase trans- Figure 9 Decomposition of the problem depicted in Figure 8.…”

Section: Crack Growth Analysismentioning

confidence: 99%

Bridging the PE lifetime under fatigue and creep conditions with its crystallization behavior

Kadota

Chum

Chudnovsky

1993

J of Applied Polymer Sci

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SYNOPSISThe service lifetime for several linear polyethylene copolymers was studied by fatigue-type accelerated tests. The material morphology and crystallization behavior were correlated with the lifetime and the failure modes. The correlation is based on the rate constant of material degradation (RCMD ) recently introduced by the authors within a mathematical model for crack layer growth kinetics. RCMD is found to depend on the loading conditions (e.g., creep or fatigue) and on material morphology reflected in crystallization kinetics. The ratio of RCMDs for fatigue and creep is a scaling factor that allows one to correlate fatigue and creep lifetimes. The dependence of the RCMD's ratio on the morphological features associated with the primary and secondary crystallization kinetics is also reported in this paper. 0 1993 John Wiley & Sons, Inc.

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“…Thus, the fatigue performance of the welded pipes was significantly reduced by the welding defect, even when the defect size was very small. The effect of the welding defect on the fatigue performance was similar to that of large voids and inclusions that were produced during manufacture within the pipe wall [13]. Therefore, a single welding defect can significantly accelerate the failure of the welded joints under the fatigue loading even for a small welding defect, such as that the defect size is 15% of the thickness.…”

Section: Fatigue Testmentioning

confidence: 94%

Effects of defects on failure of butt fusion welded polyethylene pipe

Lai

Tun

Yoon

et al. 2016

International Journal of Pressure Vessels and Piping

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The performance and causes of failure of polyethylene pipes subjected to constant and fluctuating internal pressure loadings

Cited by 77 publications

References 7 publications

Influence of joining on the fatigue and fracture behavior of high density polyethylene pipe

Influence of joining on the fatigue and fracture behavior of high density polyethylene pipe

Bridging the PE lifetime under fatigue and creep conditions with its crystallization behavior

Effects of defects on failure of butt fusion welded polyethylene pipe

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