Environmental effect on the mechanical properties of commingled-yarn-based carbon fibre/polyamide 6 composites

Prabhakaran, R.T. Durai; Toftegaard, Helmuth Langmaack

doi:10.1177/0021998313501012

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…Other studies investigated the effect of aging on the mechanical properties of C/PA6 but without using tests which enable data to be used for designing purposes (ILSS, three point bending, etc.) [43], [44]. Also, in the latter, aging was conducted at high temperatures (60 and 80°C) for long exposure times, which is known to cause hydrolysis for polyamides [45], and is not the purpose of the current paper.…”

Section: Resultsmentioning

confidence: 99%

Effect of sea water and humidity on the tensile and compressive properties of carbon-polyamide 6 laminates

Arhant

Gac

Gall

et al. 2016

Composites Part A: Applied Science and Manufacturing

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Thermoplastic matrix carbon fibre composites offer considerable potential for underwater applications. Various material options exist but there are questions concerning the tension/compressive behaviour and water sensitivity of the less expensive polymers (e.g. polyamides) for these applications. The aim of the current work is to model water diffusion and its effect on the mechanical properties of thick carbon fibre reinforced polyamide-6 composite cylinders immersed in sea water for deep sea applications. To provide the data for such a model, thin specimens (2 mm thick) have been aged under different humidity conditions and tested in tension and compression. As water enters the composite, a significant reduction in the laminate properties is observed. An empirical relationship that links matrix-dominated properties to water content is presented and can be used for modelling purposes.More than 70% of the oceans remain unexplored. With an average depth of over 3800 meters, it is necessary to design exploration devices that are able to withstand high hydrostatic pressures. The lighter these pressure vessels are the more equipment and measuring instruments they can carry, so composites have been used underwater for many years [1]. The use of composites for pressure hulls of underwater vehicles and submarines has been an ongoing research topic for many years, since the early work in the UK by Smith and colleagues in the 1970"s [2]. The use of glass and carbon reinforced thermoset composite materials for deep-sea applications needs a thorough understanding of the behaviour of these materials under hydrostatic pressure.However, the ability to predict the implosion pressures of such materials and under such loadings (bi-axial compression) is not an easy task, as was demonstrated by the results of the World Wide Failure Exercise [3].Applications for thick thermoplastic cylinders for underwater applications are rarer, even though there is an increasing number of thermoplastic matrix polymers available on the market such as polypropylene (PP), polyamide (PA), polyphenylene sulphide (PPS), polyetheretherketone (PEEK), etc. They offer possibilities for forming by local heating, attractive mechanical properties, good environmental resistance and the potential for end of life recycling. More ductile and reparable by melting, they offer a real potential for greatly improved devices. Studies have been conducted in the USA on carbon/PEEK cylinders [4], [5] and by the author [6] and were found to be very promising as they imploded at comparable pressures to those of their carbon/epoxy counterparts. However, it is not clear to what extent the compressive behaviour of thermoplastic composites in the presence of water will limit the operating depth of an underwater pressure vessel, especially for carbon/polyamide 6 (C/PA6) composites. The latter are attractive as they are much less expensive than composites based on high performance matrix polymers such as PEEK.The mechanical behaviour of composite materials has been extensively expl...

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Section: Resultsmentioning

confidence: 99%

Effect of sea water and humidity on the tensile and compressive properties of carbon-polyamide 6 laminates

Arhant

Gac

Gall

et al. 2016

Composites Part A: Applied Science and Manufacturing

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“…There are limited studies on the composites manufactured from fabric using hybrid yarn especially biocomposite [5,7,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Characterization of thermoplastic natural fibre composites made from woven hybrid yarn prepregs with different weave pattern

Baghaei

Skrifvars

Berglin

2015

Composites Part A: Applied Science and Manufacturing

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“…Among the available thermoplastic fibers, polyamide fibers are considered as a good candidate due to its properties such as low cost, good thermal stability, low dielectric constant, high mechanical strength, easy handling, and chemical inertness [25]. So, TPNF matched with carbon fiber is chosen as raw materials for the new fabric design and preparation.…”

Section: Design and Preparation Of New Fabricsmentioning

confidence: 99%

Shape-preserving property of the carbon fabric with a thermal bonding layer

Fang

Chen

Guo

et al. 2020

Journal of Industrial Textiles

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Based on the problem of shape-preserving property of complex geometry shape preform, a kind of new fabric with thermal bonding layers was designed in our work. From the apparent view, it can be seen that the carbon cloth was attached with a layer of thermal bonding layer structure. The two adjacent carbon fabrics can be bonded together by the thermal bonding layers through hot press actions. Because of the particular characteristics, this type of fabrics can help to achieve the overall integrity of complex geometry shape preform. This kind of particular fabric with thermal bonding layers was prepared by 3D weaving process using carbon fiber and thermoplastic nylon fiber. To evaluate the effect of thermal bonding layers on shape-preserving property of fabric, the fabrics were prepared with five different contents of thermoplastic nylon fiber. And the pure carbon cloth without thermoplastic nylon fiber was also prepared as control group. The shape-preserving property of fabric was evaluated by single-wing springback test and fabric peeling test in the 0° and 90° direction. The experimental results show that the effect on shape-preserving property of fabric enhanced with the increase of contents of thermoplastic nylon fiber, and the shape-preserving property of fabric was more significant in 0° direction compared with 90° direction.

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Environmental effect on the mechanical properties of commingled-yarn-based carbon fibre/polyamide 6 composites

Cited by 5 publications

References 21 publications

Effect of sea water and humidity on the tensile and compressive properties of carbon-polyamide 6 laminates

Effect of sea water and humidity on the tensile and compressive properties of carbon-polyamide 6 laminates

Characterization of thermoplastic natural fibre composites made from woven hybrid yarn prepregs with different weave pattern

Shape-preserving property of the carbon fabric with a thermal bonding layer

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