Fracture behaviour of a rapidly cured polyethersulfone toughened carbon fibre/epoxy composite

Agius, Steven; Magniez, Kevin; Fox, Bronwyn

doi:10.1016/j.compstruct.2009.09.045

Cited by 26 publications

(18 citation statements)

References 14 publications

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“…Quickstep is a rapid OOA technology, which uses as high as 40°C/min ramp rates and shorter cure cycles compared to autoclaves . The rapid heating/cooling of the laminate is achieved by using a Heat Transfer Fluid (HTF) due to the higher heat capacity of fluids.…”

Section: Introductionmentioning

confidence: 99%

“…The higher ramp rates lead to the lower minimum viscosity of the resin and possibly improved fiber‐matrix adhesion due to better fiber wetting . In addition to the vacuum pressure, the weight of the HTF provides a modest consolidation pressure of 10–30 kPa in Quickstep process where high‐quality laminates with 61% fiber volume fraction and 2–5% void content can be manufactured . Khan et al reported that 977‐2A carbon/epoxy laminates manufactured by Quickstep absorb a high amount of moisture because of higher resin content and increased crosslink density compared with laminates cured in an autoclave.…”

Section: Introductionmentioning

confidence: 99%

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Magnet assisted composite manufacturing: A novel fabrication technique for high‐quality composite laminates

2017

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A novel fabrication method, Magnet Assisted Composite Manufacturing (MACM), is developed to produce highquality composite laminates out of an autoclave. This technique involves the placement of high-temperature Neodymium permanent magnets on a vacuum bag to generate sufficiently high consolidation pressure during cure, thus eliminating the necessity of using an autoclave. The objective of this study is to demonstrate the ability of MACM to fabricate high-performance laminates, which have comparable mechanical properties, fiber volume fraction, and void content to those achieved by autoclave curing. Towards this goal, eight-ply, woven carbon/epoxy laminates were fabricated in an oven by MACM and in an autoclave using the same thermal cycle. The thickness of the laminates cured by MACM indicated that an effective consolidation pressure of 0.29

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnet assisted composite manufacturing: A novel fabrication technique for high‐quality composite laminates

2017

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“…The use of the rubbers, however, leads to decreases in the thermal stability and modulus values of the toughening materials. To improve the properties of epoxy resins toughened by rubbers, high‐modulus and heat‐resistant thermoplastics, for example, poly(ether sulfone),14–16 poly(ether ether ketone),17 poly(ether imide),18, 19 and polyimide,20 have been used as toughening agents. However, their low solubility and fluidity deteriorate the curing and adhesive performances of the epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

Effect of the structure of curing agents modified by epoxidized oleic esters on the toughness of cured epoxy resins

Cheng

Chen

et al. 2010

J of Applied Polymer Sci

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The aim of this study was to determine the effect of the ester carbon chain length of curing agents modified by epoxidized oleic esters on the toughness of cured epoxy resins. An amine-terminated prepolymer (i.e., curing agent G) was synthesized from a bisphenol A type liquid epoxy resin and triethylene tetramine. The toughening curing agents (G1 and G2) were prepared by reactions of epoxidized oleic methyl ester and epoxidized oleic capryl ester, respectively, with curing agent G. Fourier transform infrared spectrometry was used to characterize the chemical structure of the curing agents. The effects of the carbon chain length of the oleic ester group in the curing agents on the toughness and other performances of the curing epoxy resins were investigated by analysis of the Izod impact strength, tensile strength, elongation at break, thermal properties, and morphology of the fracture surfaces of the samples. The results denote that the toughness of the cured epoxy resins increased with the introduction of oleic esters into the curing agents without a loss of mechanical properties and that the toughness and thermal stability of the materials increased with increasing ester carbon chain length. The toughness enhancement was attributed to the flexibility of the end carbon chains and ester carbon chains of the oleic esters in the toughening curing agents.

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“…In previous work [17,27], the authors identified that volatiles within the prepreg were detrimental to the overall performance of the composite material. Here we use TGA -mass spectrometry to identify and quantify these.…”

Section: Thermal Gravimetric Analysis -Mass Spectrometrymentioning

confidence: 97%

Rapidly cured out-of-autoclave laminates: Understanding and controlling the effect of voids on laminate fracture toughness

Agius

Fox

2015

Composites Part A: Applied Science and Manufacturing

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Fracture behaviour of a rapidly cured polyethersulfone toughened carbon fibre/epoxy composite

Cited by 26 publications

References 14 publications

Magnet assisted composite manufacturing: A novel fabrication technique for high‐quality composite laminates

Magnet assisted composite manufacturing: A novel fabrication technique for high‐quality composite laminates

Effect of the structure of curing agents modified by epoxidized oleic esters on the toughness of cured epoxy resins

Rapidly cured out-of-autoclave laminates: Understanding and controlling the effect of voids on laminate fracture toughness

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