Prediction of service lifetimes of elastomeric seals during radiation ageing

Burnay, S.G.; Hitchon, J.W.

doi:10.1016/0022-3115(85)90458-1

Cited by 26 publications

(14 citation statements)

References 6 publications

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“…When specimen are submitted to UV irradiation, several attempted to extract an equivalence principle [25] [26] [27]. The most suitable in our case is based on dose equivalency which is consistent with the concept of a limited diffusion inducing an oxidative degradation in a thin layer of the specimen [27].…”

Section: Equivalence Principlementioning

confidence: 82%

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Effect of UV Ageing on the fatigue life of bulk polyethylene

et al. 2018

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Abstract. Polymers operating in various weathering conditions must be assessed for lifetime performance. Particularly, ultraviolet (UV) radiations alters the chemical structure and therefore affect the mechanical and fatigue properties. The UV irradiation alters the polymer chemical structure, which results into a degradation of the mechanical and fatigue behavior of the polymer. The polymer properties degradation due to UV irradiation is the result of a competitive process of chain scission versus post-crosslinking. Although few studied investigated the effect of UV irradiation on the mechanical behaviour of thermoplastics, fewer examined the UV irradiation effect on the fatigue life of polymers. This study focuses on investigating the effect of UV irradiation on the fatigue properties of bulk semi-crystalline polymer; the low density Polyethylene (LDPE). Tensile specimens were exposed to different dose values of UV irradiation then subjected to fatigue loading. The fatigue tests were achieved under constant stress amplitude at a frequency of 1Hz. The results show an important decrease of the fatigue limit with increasing absorbed UV irradiation dose.

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Section: Equivalence Principlementioning

confidence: 82%

“…The most suitable in our case is based on dose equivalency which is consistent with the concept of a limited diffusion inducing an oxidative degradation in a thin layer of the specimen [27]. In this case, the shift factor is simply expressed as follows:…”

Section: Equivalence Principlementioning

confidence: 83%

Effect of UV Ageing on the fatigue life of bulk polyethylene

et al. 2018

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“…Burnay and Hitchon performed measurements of leakage rates, sealing force, and compression set on polyurethane and fluoroelastomer (Viton ® E-60C) seals over a limited range of temperature and irradiation conditions to compare these techniques for their effectiveness in determining seal lifetimes [35]. Time-temperature superposition principles were then used over a range of dose rates and temperatures.…”

Section: Wsrc-tr-98-00439 December 1998mentioning

confidence: 99%

Performance Evaluation of O-Ring Seals in Model 9975 Packaging Assemblies (U)

Skidmore¹

1998

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“…Therefore, the irradiation rate specified by WRPS is more representative than dose rate of 95 krad/hr. Use of this more representative irradiation rate will require longer irradiation times to achieve the exposures requested by WRPS, and thus largely eliminate the issue of limited time for O 2 diffusion into the test specimens (Burnay and Hitchon, 1985;Gillen et al, 1989;Wise et al, 1997;Gillen et al, 2003), which could bias the results in favor of reduced damage. Hanford tank farms nonmetallic materials are evaluated to a nominal 250 Rad/hr based on the above histogram detailing supernatant exposure.…”

Section: Beta and Gamma Irradiation Ratesmentioning

confidence: 99%

“…Maintaining oxic conditions in the vessels will replicate in-service conditions, but might not address diffusion-limited oxidation (Burnay and Hitchon, 1985;Gillen and Clough, 1989;Wise et al, 1997;Gillen et al, 2003), which could bias the results in favor of reduced damage. Oxic conditions could also be representative of those in the primary hoses used in the Hanford tank farms.…”

Section: Test Control and Monitoringmentioning

confidence: 99%