Slow crack propagation in polyethylene: determination and prediction

Brostow, Witold; Fleißner, M.; Müller, W.

doi:10.1016/0032-3861(91)90444-n

Cited by 43 publications

(15 citation statements)

References 36 publications

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“…Our Brownian dynamics simulation of dilute solution flow show, first of all, the importance of polymer + solvent interactions 9) . A combinatorial formula for the number of chain overlaps which neglects such interactions 21) gives too low numbers of interchain contacts, except at the lowest segment number densities. In the same simulations at high shear rates the average number of entanglements per chain and the average number of interchain contacts decrease along with an increase in the shear rate 9) .…”

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confidence: 99%

Drag reduction and solvation in polymer solutions

Brostow¹,

Majumdar

Singh

1999

Macromol. Rapid Commun.

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SUMMARY: A model is described which explains drag reduction (DR) in dilute polymer solutions in terms of solvation of macromolecular chains and formation of relatively stable domains. The domains partly suppress the vortex formation, act as energy sinks, and also play a role in mechanical degradation in flow (MDF). We report ultrasonically determined solvation numbers for a series of copolymers with the same chemical structure but differing widely in their intrinsic viscosities. The solvation numbers confirm the model. Thus, we have a criterion for selection of DR agents with low MDF for: oil well operations; crude oil transport; fire fighting; high sewer throughput; irrigation; hydrotransport of solids; marine applications; and biomedical applications including the arteriosclerosis prevention.

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confidence: 99%

Drag reduction and solvation in polymer solutions

Brostow¹,

Majumdar

Singh

1999

Macromol. Rapid Commun.

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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: 98%

Structural integrity assessment of defected high density poly-ethylene pipe: Burst test and finite element analysis based on J-integral criterion

Guidara

Bouaziz

Schmitt

et al. 2015

Engineering Failure Analysis

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“…Clearly this is only one of many possible ways of filling 9 cells -and all other such ways include overlaps. This problem was analyzed by Wolff and the present author in terms of combinatorial statistics [26] and the negligible probability of the configuration displayed in Fig. 4 was demonstrated.…”

Section: Mechanism Of Drag Reductionmentioning

confidence: 99%