Morphological Determinations of Fiber Composites

Avérous, Luc; Quantin, Jean-Christophe; Lafon, Dominique; Crespy, A.

doi:10.1051/mmm:1996142

Cited by 3 publications

(2 citation statements)

References 12 publications

(16 reference statements)

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“…This correction is based on the inclusion probability of the cells into the image frame. For this purpose, the methodology of image frame correction, developed by Miles and Lantuejoul [24,25] was applied. The following data were obtained:…”

Section: Void Fractionmentioning

confidence: 99%

Development of poly(lactic acid) cellular materials: Physical and morphological characterizations

Julien

Bénézet

Lafranche

et al. 2012

Polymer

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The present study aims at assessing the extrusion foaming characteristics of two commercial grades of poly(lactic acid) (PLA) using a chemical foaming agent (CFA). For each PLA the process was optimized based on a maximal void fraction criterion. The extruder die temperature significantly affects the void content (maximal for about 195 C). An increase in the barrel temperature profile was also correlated with an increase in the void fraction. Moreover an increase in CFA concentration increased the PLA void fraction, and in some cases induced a decrease in cell density and an increase in cell size. Finally, an optimal value of 47% void fraction was obtained. Finally, optimally processed PLAs with varying CFA contents were tensile tested. The results pointed out that it was possible to observe significant decrease in the density and increase in some specific mechanical properties by controlling the extrusion foaming process.

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Section: Void Fractionmentioning

confidence: 99%

Development of poly(lactic acid) cellular materials: Physical and morphological characterizations

Julien

Bénézet

Lafranche

et al. 2012

Polymer

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“…Evidently, an inhomogeneous microstructure can result in local variations of the stress concentration, which can affect the mechanical performance of the composite material [3,4]. In recent years, in order to characterize the microstructures of fiber-reinforced composites, different image-analysis techniques have been applied using optical microscopy or scanning electron microscopy (SEM) [5][6][7]. One of the methods used to quantitatively describe the microstructure is a Voronoi diagram, commonly known as the Dirichlet tessellation [8,9].…”

Section: Introductionmentioning

confidence: 99%

A Voronoi-diagram analysis of the microstructures in bulk-molding compounds and its correlation with the mechanical properties

Bertoncelj¹,

Vojisavljević²,

Rihtarsic³

et al. 2016

Express Polym. Lett.

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Abstract. Voronoi analysis is implemented to assess the influence of fiber content on the microstructure and mechanical properties of bulk-molding compounds containing different weight fractions of E-glass fibers (EGF) (5-20 wt%). The fiber distribution in the polymer matrix is analyzed by scanning electron microscopy followed by the Voronoi tessellations, radial distribution function and statistical calculations. The experimental results are compared to modelled microstructures. The derived microstructural descriptors allow us to correlate the fiber weight content and the degree of fiber distribution homogeneity with the mechanical properties of EGF-reinforced composites. The distribution of fibers in composites with 10 and 15 wt% of fibers could be considered as the most homogeneous. This is in a good agreement with the results of the flexural strength and dynamic mechanical analyses, which confirmed that the latter samples exhibit the highest level of reinforcement.

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1998

Materials Science &Amp; Technology

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Morphological Determinations of Fiber Composites

Cited by 3 publications

References 12 publications

Development of poly(lactic acid) cellular materials: Physical and morphological characterizations

Development of poly(lactic acid) cellular materials: Physical and morphological characterizations

A Voronoi-diagram analysis of the microstructures in bulk-molding compounds and its correlation with the mechanical properties

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