On the origin of heat build-up in polyester ropes

Bosman, Rigo

doi:10.1109/oceans.1996.572762

Cited by 9 publications

(14 citation statements)

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“…Within this application, fatigue is characterized as the main degradation mechanism of the synthetic fibres [4], rather than factors such as surface wear, tensile and structural imperfections and environmental factors that can be corrected with a carefully planned rope design. The fatigue effect over these fibres can be further subdivided in two subsequent steps of resistance decrease [4]: hysteresis heating and axial compression [11].…”

Section: Fatiguementioning

confidence: 99%

“…The fatigue effect over these fibres can be further subdivided in two subsequent steps of resistance decrease [4]: hysteresis heating and axial compression [11]. …”

Section: Fatiguementioning

confidence: 99%

“…Polyester ropes are known to have a resistance to fatigue equal to or more effective than steel cables [4]. The life of a Polyester cable subjected to a continuous cycling between 70 % and 0 % MBL (Maximum Breaking Load) is approximately 100 000 cycles.…”

Section: Feasibility Of the Experimental Phasementioning

confidence: 99%

“…In the first one, the end of the line is entirely laid on the seabed, causing exclusively horizontal stress on it. However, in the taut-leg mode, the mooring line is always axially tensioned; exposing the importance of having a proper knowledge regarding the mechanical behaviour of polymeric materials experimentally, which is encouraged by the literature [4]. An illustration of the aforementioned mooring configurations is shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic Stress Analysis of Polyester, Aramid, Polyethylene and Liquid Crystal Polymer Yarns

et al. 2016

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Abstract. Mooring ropes used in offshore oil platforms are exposed to a set of extreme environmental conditions that can be crucial to their behaviour in service. Considering the elevated mechanical demands on these ropes imposed by both the undersea environment and the station keeping of the vessel, this paper is focused on the experimental determination of the yarns fatigue behavior. In order to be able to foresee and compare their general wear rate, a diagram that correlates the force to which the specimens are submitted to the number of cycles for failure for each material is achieved. The analyzed fibers are Polyester, Aramid, Polyethylene and Liquid Crystal Polymer (henceforth quoted as PET, AR, PE and LCP, respectively), and this work followed a pattern composed by a fixed test frequency and an established maximum stress for the diagrams.

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Section: Fatiguementioning

confidence: 99%

“…The fatigue effect over these fibres can be further subdivided in two subsequent steps of resistance decrease [4]: hysteresis heating and axial compression [11]. …”

Section: Fatiguementioning

confidence: 99%

Section: Feasibility Of the Experimental Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cyclic Stress Analysis of Polyester, Aramid, Polyethylene and Liquid Crystal Polymer Yarns

et al. 2016

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“…Com características de comportamento não-linear viscoplástico e viscoelástico (Huang et al, 2012), o poliéster foi o primeiro material a ser empregado nas aplicações de amarrações de plataformas em águas profundas (CHIMISSO, 2011) devido à sua elevada resistência à fadiga, e com a vantagem de não ser afetada pela água do mar (BOSMAN, 1996). No entanto, esse material apresenta uma redução significativa do número de ciclos até a ruptura quando sujeito a limites de carregamento cíclico com elevada força máxima (BOSMAN, 1996), suportando aproximadamente 100.000 ciclos quando opera entre 0% e 70% YBL (Yarn Break Load). Quando a força de carregamento de pico é reduzida para 60% YBL, essa fibra suporta em torno de 1.000.000 de ciclos (VANNUCCHI et al, 2016).…”

Section: Introductionunclassified

Estudo Experimental Sobre Os Efeitos Do Impacto Em Tração Na Resistência À Fadiga E No Alongamento De Fios De Poliéster Aplicados Em Cabos De Amarração De Plataformas Offshore

Louzada¹,

Guilherme²,

Stumpf³

2017

MUNDI ETG

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Resumo: Atualmente, o início da exploração de petróleo em águas cada vez mais profundas trouxe consigo a preferência pelo uso de cabos sintéticos para as amarrações de plataformas. Este trabalho tem por objetivo conhecer os efeitos do impacto na resistência à fadiga e no alongamento de fios de poliéster (PET). Através dos materiais e equipamentos disponibilizados pela Universidade Federal do Rio Grande -POLICAB é realizado um ensaio de impacto e em seguida o ensaio de fadiga até a ruptura do multifilamento polimérico, permitindo comparar os resultados com os encontrados na literatura e constatando-se que uma carga vertical súbita provoca redução na vida útil do fio.Palavras-chave: Cabos Sintéticos. Impacto. Fadiga. Abstract:Nowadays, the beginning of the oil exploration in deep-water produced a preference to use of synthetic cables in mooring of platform. This paper aims to understanding the effects of the impact on fatigue resistance and elongation of the polyester (PET) yarns. With the materials and equipment provided by Universidade Federal do Rio Grande -POLICAB is realized a tensile impact test and after that, a testing of fatigue until the fail of the multifilament polymeric. In the sequence, the results are compares with the provided by literature and verified that a sudden vertical load produces a reducing the life in fatigue of the yarns.

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Synthetic mooring ropes for marine renewable energy applications

et al. 2015

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Synthetic mooring ropes have a proven track record of use in harsh operating conditions over the past two decades. As one of the main users of ropes for permanent mooring systems, the oil and gas industry has opted for these components because they possess performance characteristics and economies of scale which are in many respects superior to steel components. Given this accrued experience, it is unsurprising that several marine renewable energy (MRE) device developers have utilised synthetic ropes, motivated by the need to specify economical, reliable and durable mooring systems. Whilst these components are potentially an enabling technology for the MRE sector, this is a new eld of application which can feature highly dynamic mooring tensions and consequently existing certication practices may not be directly applicable. Based on the expertise of the authors, this paper provides a state-of-the-art overview of synthetic ropes in the context of MRE mooring systems, including key information about aspects of specication (performance attributes, classication and testing) as well as application (installation, degradation, maintenance, inspection and decommissioning). It is the intention of this review to provide valuable insight for device developers who are considering using ropes in the specication of t for purpose mooring systems.

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On the origin of heat build-up in polyester ropes

Cited by 9 publications

References 1 publication

Cyclic Stress Analysis of Polyester, Aramid, Polyethylene and Liquid Crystal Polymer Yarns

Cyclic Stress Analysis of Polyester, Aramid, Polyethylene and Liquid Crystal Polymer Yarns

Estudo Experimental Sobre Os Efeitos Do Impacto Em Tração Na Resistência À Fadiga E No Alongamento De Fios De Poliéster Aplicados Em Cabos De Amarração De Plataformas Offshore

Synthetic mooring ropes for marine renewable energy applications

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