A fatigue-to-creep correlation in air for application to environmental stress cracking of polyethylene

Ayyer, Ravi; Hiltner, A.; Baer, E.

doi:10.1007/s10853-006-1108-2

Cited by 13 publications

(2 citation statements)

References 16 publications

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“…Within these methods, the time to failure is commonly the characteristic criterion to assess ESCR. In order to shorten testing times or to study specific fracture mechanisms, cyclic loading is often conducted through fatigue testing, as also demonstrated with the CRB test [10][11][12][13]. A different and widely used standardized method to determine a material's fracture toughness employs displacement controlled experiments of notched specimen [14].…”

Section: Introductionmentioning

confidence: 99%

Environmental Stress Cracking of High-Density Polyethylene Applying Linear Elastic Fracture Mechanics

et al. 2022

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The crack propagation rate of environmental stress cracking was studied on high-density polyethylene compact tension specimens under static loading. Selected environmental liquids are distilled water, 2 wt% aqueous Arkopal N100 solution, and two model liquid mixtures, one based on solvents and one on detergents, representing stress cracking test liquids for commercial crop protection products. The different surface tensions and solubilities, which affect the energetic facilitation of void nucleation and craze development, are studied. Crack growth in surface-active media is strongly accelerated as the solvents induce plasticization, followed by strong blunting significantly retarding both crack initiation and crack propagation. The crack propagation rate for static load as a function of the stress intensity factor within all environments is found to follow the Paris–Erdogan law. Scanning electron micrographs of the fracture surface highlight more pronounced structures with both extensive degrees of plasticization and reduced crack propagation rate, addressing the distinct creep behavior of fibrils. Additionally, the limitations of linear elastic fracture mechanisms for visco-elastic polymers exposed to environmental liquids are discussed.

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Section: Introductionmentioning

confidence: 99%

Environmental Stress Cracking of High-Density Polyethylene Applying Linear Elastic Fracture Mechanics

et al. 2022

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“…Many researchers had investigated the mechanical properties [1][2][3][4][5], durability [6][7][8][9], or lifetime prediction [10,11] of the plastic pipes such as polyethylene pipes, cross-linked polyethylene pipes, complex pipes, etc. It has been well known for a long time that polyethylene pipes under pressure exhibit a ductile failure at short-term and a brittle failure at long-term.…”

Section: Introductionmentioning

confidence: 99%

Study on the Structure of Peroxide Cross-Linked Polyethylene Pipes with Several Stabilizers

Hirabayashi¹,

Iguchi²,

Yamada³

et al. 2013

MSA

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Cross-linked polyethylene (PEX) pipes used in hot water supply are required for high mechanical strength and high creep resistance at high temperature. Especially PEX-a pipes which are made by peroxide cross-linking have better performance, such as creep resistance and thermal shock resistance than the pipes made by the other cross-linking method. Because the PEX-a pipes indicate the higher cross-link degree as compared with the other PEX pipes. In this study, the PEX-a pipes which were mixed with several stabilizers were tested to evaluate the effects on cross-link degree and the oxygen induction time. And also they are evaluated with the chlorine aqueous solution by the performance of the long-term hydrostatic pressure test and the long-term hydro dynamic pressure test. As a result, it was found that the combination of antioxidants for PEX-a pipes plays an important role to prolong the oxygen induction time without inhibiting the cross-linking. From the results of the 1 H pulsed NMR measurement over the melting point of polyethylene, it was found that each peroxide PEX pipe with different antioxidant combinations indicated the different proportion and crosslink density of cross-linked region, in addition, that these pipes had the effective structure of cross-linking for the hydrostatic and hydrodynamic pressure test with the chlorine aqueous solution. Therefore, it was considered to be useful results for studies of the stricture of cross-linking of polyethylene.

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Fracture Mechanics Methods to Assess the Lifetime of Thermoplastic Pipes

Arbeiter

Pinter

Lang

et al. 2017

Deformation and Fracture Behaviour of Polymer Materials

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A fatigue-to-creep correlation in air for application to environmental stress cracking of polyethylene

Cited by 13 publications

References 16 publications

Environmental Stress Cracking of High-Density Polyethylene Applying Linear Elastic Fracture Mechanics

Environmental Stress Cracking of High-Density Polyethylene Applying Linear Elastic Fracture Mechanics

Study on the Structure of Peroxide Cross-Linked Polyethylene Pipes with Several Stabilizers

Fracture Mechanics Methods to Assess the Lifetime of Thermoplastic Pipes

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