The influence of fibre diameter on the tensile behaviour of short-glass-fibre reinforced polymers

Ramsteiner, F.; Theysohn, R.

doi:10.1016/0266-3538(85)90075-2

Cited by 46 publications

(20 citation statements)

References 5 publications

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“…The results for the unnotched impact dependence shown in Figures 13-14 are well in line with the few results on this subject available in the literature (7)(8)(9)(10)(11). Despite the technological importance of the unnotched impact resistance of this class of composite there has been surprisingly little detailed work published on this subject.…”

Section: Discussionsupporting

confidence: 79%

“…The various properties have been normalised to values obtained with the P10 glass and the error bars represent the 95% confidence interval for the mean values. What can be observed in these Figures is a pattern of dependence of mechanical properties of GF-PA66 on average fibre diameter which has been observed by others (7)(8)(9)(10)(11). Tensile modulus shows little significant change with fibre diameter in this range.…”

Section: Resultssupporting

confidence: 55%

“…The mechanical performance of these composites results from a combination of the fibre and matrix properties and the ability to transfer stresses across the fibre-matrix interface. Variables such as the fibre content, diameter, orientation and the interfacial strength are of prime importance to the final balance of properties exhibited by injection moulded thermoplastic composites (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). The optimization of composite processibility and performance through control of the base materials and the various steps of fibre-matrix combination and parts production is already a major technical challenge.…”

Section: Introductionmentioning

confidence: 99%

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Structure–property relationships in glass reinforced polyamide, part 2: The effects of average fiber diameter and diameter distribution

Thomason

2007

Polymer Composites

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This version is available at https://strathprints.strath.ac.uk/5798/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.Structure-property relationships in glass reinforced polyamide: 2) The effects of average fibre diameter and diameter distribution. J. L. Thomason AbstractWe present the results of an extensive study of the influence of average fibre diameter and the width of the diameter distribution on the performance of injection moulded glass-fibre reinforced polyamide 66. In the average fibre diameter range from 9-18μm dry-as-moulded (DaM) composite unnotched impact and tensile strength decreased significantly. The composite notched impact performance and tensile modulus showed little dependence on fibre diameter. The influence of broadening the fibre diameter distribution by blending glass fibre samples of different average diameter was found to be particularly negative on the level of composite unnotched impact when compared at equal number average diameter. After hydrolysis treatment the composite tensile strength and modulus exhibited a large drop compared to the DaM results. In contrast, the unnotched impact results became insensitive to fibre diameter after hydrolysis. The average level of unnotched impact after hydrolysis was sufficiently high to show an increase over DaM when the fibre diameter was above 14μm. Residual fibre length correlated significantly with fibre diameter with a lower average length for thinner fibres. The interfacial shear strength was found to be in the range of 26-34 MPa for DaM composites. There was a highly significant inverse correlation between the DaM interfacial strength and the average fibre diameter. It is shown that results from both tensile and unnotched impact measurements can be brought back to single trend lines by using a Z average value for the average fibre diameter which is more heavily weighted to the thicker fibres in the distribution.

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Section: Discussionsupporting

confidence: 79%

Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Structure–property relationships in glass reinforced polyamide, part 2: The effects of average fiber diameter and diameter distribution

Thomason

2007

Polymer Composites

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“…The suppression of the initiation and propagation of the microcracks around fibers are considered to be achieved due to the interactions, which can be expected to improve the composite strength and toughness. The influence of the fiber diameter on the mechanical properties of the composite has already been studied by Ramsteiner and Theysohn [15]. However, it was more concerned with larger diameter fibers than the conventional ones.…”

Section: Introductionmentioning

confidence: 98%

Reinforcing Mechanism by Small Diameter Fiber in Short Fiber Composite

Sato

Kurauchi

Sato

et al. 1988

Journal of Composite Materials

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Influence of fiber diameter on the mechanical properties of short fiber composite was studied by using smaller diameter fibers than conventional ones. Strength and toughness of the composite reinforced with the small diameter fibers were improved, compared to those of the composite reinforced with the conventional ones, except for extremely small diameter fibers. Thus, there exists the maximum value for the strength and toughness for the optimum fiber diameter. This result indicates that there is an optimum condition for the reinforcing effectiveness by the small diameter fibers. In order to analyze the reinforcing mechanism by the small diameter fibers, fracture mechanism of the composite was studied by an acoustic emission analysis, in-situ SEM observation of failure process, and observation of plastic deformation of the matrix. As a result, initiation and propagation of microcracks occurring at fiber/matrix interface were found to be strongly suppressed by using the small diameter fibers, compared with those in the conventional composite. A model for explaining the reinforcing mechanism by the small diameter fibers was proposed, which can well explain the presence of the optimum fiber diameter, resulting in the highest reinforcing effectiveness for the composite.

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“…[1][2][3] For advanced applications such as highperformance composites, [3][4][5] epoxy resins are commonly reinforced with high modulus materials such as glass or carbon rovings to increase the tensile strength of the composite. [6][7][8][9] The rovings consist of hundreds or thousands of individual filaments with diameters in the range of several micrometers. However, filamentous materials are also subject to size effects [10] in such a way that nanocomposites with reinforcements in the nanometer range, such as carbon nanotubes, nanofibers, or silica nanoparticles, show significantly improved material properties.…”

mentioning

confidence: 99%