Characterization of the aramid/epoxy interfacial properties by means of pull-out test and influence of water absorption

Tanaka, Kazuto; Minoshima, Kohji; Grela, Witold; Komai, Kenjiro

doi:10.1016/s0266-3538(02)00147-1

Cited by 51 publications

(26 citation statements)

References 14 publications

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“…The same carbon fibre used for NCF were used for a single fibre pull-out test [8], and PC resin was used for a matrix and polyester thin film was used as a tab. Fig.…”

Section: Mechanical Testingmentioning

confidence: 99%

Effect of water absorption on the mechanical properties of continuous carbon fibre reinforced polycarbonate composites

Tanaka

Fukushima

Kashihara

et al. 2010

WIT Transactions on the Built Environment

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Carbon fibre reinforced thermoplastics (CFRTP) attract attention due to their excellent features of specific strength, specific modulus, productivity and recyclability in various fields. In this research, polycarbonate (PC) was used as a matrix of CFRTP with high impact strength compared with other plastics. However, at high temperature and high humidity conditions, hydrolyzation of an ester linkage in PC occurs, at the same time crazes and cracks also occur and the mechanical properties of PC deteriorate. Water absorption testing and tensile testing were also carried out to investigate the influence of water absorption on the mechanical properties on the CF/PC composite and PC resin. Single fibre pull-out tests were carried out to investigate the influence of water absorption on CF/PC interfacial shear strength. The water gain of PC was saturated at 0.46%. For the CF/PC composite, water was absorbed not only in the PC resin but also in the fibre/matrix interface. The tensile strength of the PC resin showed a tendency to decrease as the water absorption time increases, while the tensile modulus of PC did not change. The CF/PC composite showed a tendency to decrease for tensile strength and modulus when water absorption time is at 400 hours. The CF/PC interfacial shear strength showed a tendency to decrease as the water absorption time increases.

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“…The same carbon fibre used for NCF were used for a single fibre pull-out test [8], and PC resin was used for a matrix and polyester thin film was used as a tab. Fig.…”

Section: Mechanical Testingmentioning

confidence: 99%

Effect of water absorption on the mechanical properties of continuous carbon fibre reinforced polycarbonate composites

Tanaka

Fukushima

Kashihara

et al. 2010

WIT Transactions on the Built Environment

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“…Mechanical properties used in this analysis are shown in table 1 (Hull and Clyne [6], [7], Kawabata et al [8]). Friction coefficient (µ) and maximum friction stress (τ max ) at the interface were calculated from the result of the previous study [1]. µ =0.6 and τ max =11.9 MPa were obtained and used in the analysis.…”

Section: Fem Analysismentioning

confidence: 99%

“…µ =0.6 and τ max =11.9 MPa were obtained and used in the analysis. Swelling of the resin was set at 0.6% [1] and the swelling of the fiber was neglected. Examples of the Raman spectrum of Kevlar 49.…”

Section: Fem Analysismentioning

confidence: 99%

“…We carried out the single fiber pull-out tests to evaluate the influence of water absorption on the interfacial properties of aramid/epoxy composite (Tanaka et al [1]). In this study, however, the pull-out load, at which the unstable crack propagated through the total embedded fiber length, was used for the measure of the interfacial strength and the stress distribution along the fiber in the matrix was not clarified.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the fiber stress distribution during pull-out test by means of micro-Raman spectroscopy and FEM analysis

Tanaka¹,

Minoshima²,

Yamada³

2006

WIT Transactions on the Built Environment, Vol 85

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A single-fiber pull-out model composite for an aramid/epoxy system was specially designed to measure the stress distribution of the aramid fiber embedded in the matrix using micro-Raman spectroscopy. The stress transfer length of the fiber obtained was about 400-500µm, which was equal to the result of FEM analysis. Just after the initiation and propagation of the fiber/matrix interfacial debonding, the fiber was broken, and the fiber in the matrix had the axial tensile residual stress. The tensile residual fiber axial stress showed the maximum at around the tip of the interfacial debonding. The stress was reduced and became almost equal to zero after being immersed in deionized water at 80 °C for 44h. This behavior agreed with the result of FEM analysis, in which the friction coefficient was introduced in the fiber/matrix interface.

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“…Although a large quantity of data on the fiber/matrix interfacial properties of composites can be obtained in carbon fiber reinforced thermoset composites (CFRP), data on the fiber/matrix interfacial properties of CFRTP is not sufficiently available compared with CFRP. (Kim and Mai, 1998) (Koyanagi et al, 2010) (Koyanagi et al, 2011) (Sethi and Ray, 2015) (Tanaka et al, 2002) (Tanaka et al, 2003) In this study, in order to evaluate the fiber/matrix interfacial properties at 25 °C, 40 °C and 80 °C, single fiber pull-out tests, measurement of the thermal expansion coefficient of the resin, and analysis of the thermal expansion of the resin were performed, and the degradation mechanism of the fiber/matrix interfacial properties at high temperature was discussed.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the fiber/matrix interfacial strength of carbon fiber reinforced polyamide model composites

Tanaka

Hosoo

Katayama

et al. 2016

Mechanical Engineering Journal

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Carbon Fiber Reinforced Thermoplastics (CFRTP) have attracted attention in the automotive industry for their productivity and high specific strength and modulus. To guarantee the durability of CFRTP, it is important to understand the mechanical properties of CFRTP under practical service temperature. Since the mechanical properties of CFRTP are affected not only by reinforcement fibers and matrix resins but also by the fiber matrix interface, to reveal the fiber/matrix interface properties is one of the important issues to be solved. Among thermoplastic resins, polyamide (PA) is expected to be used for the matrix of CFRTP, owing to good interfacial adhesion to the carbon fiber, and good moldability. Although tensile tests of CFRTP under the high temperature environment were performed, the effects of temperature on the fiber/matrix interfacial shear strength have not been fully clarified. In this study, in order to evaluate the fiber/matrix interfacial properties at 25 °C, 40 °C and 80 °C, single fiber pull-out tests, measurement of the thermal expansion coefficient of the resin, and analysis of the thermal expansion of the resin were performed. As temperature rose, resin expanded and interfacial shear strength of the CF/PA model composites decreased. This result suggests that the decrease of the interfacial shear strength by temperature rise is caused by the expansion of the resin.

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Characterization of the aramid/epoxy interfacial properties by means of pull-out test and influence of water absorption

Cited by 51 publications

References 14 publications

Effect of water absorption on the mechanical properties of continuous carbon fibre reinforced polycarbonate composites

Effect of water absorption on the mechanical properties of continuous carbon fibre reinforced polycarbonate composites

Measurement of the fiber stress distribution during pull-out test by means of micro-Raman spectroscopy and FEM analysis

Effect of temperature on the fiber/matrix interfacial strength of carbon fiber reinforced polyamide model composites

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