Residual stress distribution in carbon fibre/thermoplastic matrix pre-impregnated composite tapes

Filiou, C.; Galiotis, Costas; Batchelder, D. N.

doi:10.1016/0010-4361(92)90283-z

Cited by 60 publications

(17 citation statements)

References 12 publications

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“…The matrix was then sufficiently transparent for in situ analysis of the embedded reinforcement material. The S 3 calibrations and in-situ measurement of Raman spectra could be used to generate strain profiles 3 f (l) along the fibre, from which other properties like (longitudinal) residual strain (3 f (l) in the lack of external stress) [414,452,455,458,459,469,470], interfacial shear stress t ci (Fig. 22 and Ref.…”

Section: In-situ Micro-raman Extensometry Of Ceramic Fibre-reinforcedmentioning

confidence: 99%

“…They also have more ''reversible'' S 3 coefficients [391,416]. The technique of mRE was most specifically applied to model polymer matrix systems reinforced with PAN [389,415,416,454e463] and Pitch [414,452] carbon fibres, aramid fibres [389,413,417,447,464e469], polyethylene fibres [470] or carbon nanotubes [471]. The matrix was then sufficiently transparent for in situ analysis of the embedded reinforcement material.…”

Section: In-situ Micro-raman Extensometry Of Ceramic Fibre-reinforcedmentioning

confidence: 99%

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Raman Spectroscopy of nanomaterials: How spectra relate to disorder, particle size and mechanical properties

Gouadec

Colomban

2007

Progress in Crystal Growth and Characterization of Materials

943

724

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The purpose of this review is to provide non-specialists with a basic understanding of the information micro-Raman Spectroscopy (mRS) may yield when this characterization tool is applied to nanomaterials, a generic term for describing nano-sized crystals and bulk homogeneous materials with a structural disorder at the nanoscale e typically nanoceramics, nanocomposites, glassy materials and relaxor ferroelectrics. The selected materials include advanced and ancient ceramics, semiconductors and polymers developed in the form of dots, wires, films, fibres or composites for applications in the energy, electronic and aeronauticseaerospace industries. The text is divided into five sections:

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Section: In-situ Micro-raman Extensometry Of Ceramic Fibre-reinforcedmentioning

confidence: 99%

Section: In-situ Micro-raman Extensometry Of Ceramic Fibre-reinforcedmentioning

confidence: 99%

Raman Spectroscopy of nanomaterials: How spectra relate to disorder, particle size and mechanical properties

Gouadec

Colomban

2007

Progress in Crystal Growth and Characterization of Materials

943

724

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show abstract

“…If so, S should eventually be proportional to [50] and others [11,36,39,40,[51][52][53][54][55][56][57][58][59][60][61][62][63][64] ), as a function of E -1/2 .…”

Section: Young's Modulus and "Raman Microextensometry"mentioning

confidence: 99%

Non-destructive mechanical characterization of SiC fibers by Raman spectroscopy

Gouadec

Colomban

2001

Journal of the European Ceramic Society

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The paper provides a comprehensive study on Raman spectroscopy versatility as a fast and non destructive tool for the prediction of the mechanical properties of SiC fibers derived from a polymeric precursor (NLM™, Hi™, Hi-S™, SA™ and Sylramic™ grades) or produced by CVD (SCS-6™ fiber), including in situ analysis in CMCs or MMCs. We show how the results of very simple spectra fitting are correlated with Young's modulus, tensile strength and microhardness. The reason why such a correlation exists, the common dependency of Raman signal and mechanical behavior to the micro/nanostructure of ceramics, is discussed. Keywords :SiC-fibers / Raman spectroscopy / Mechanical properties / Microstructure / Carbon ∂ Author to whom correspondence should be addressed Fax : 33 (0) 1 49 78 13 18 e-mail : colomban@glvt-cnrs.fr IntroductionThe reinforcement of ceramic materials by long ceramic fibers leads to low density and refractory materials, of high damage tolerance, that should be appropriate for metal alloys substitution in advanced engines (turbines) and waste treatment energy plants [1] . Ceramic fibers can also be incorporated directly in metal matrices to increase their high temperature mechanical properties [1] .SiC fibers, which are among the most stable fibers, have always been produced by the 3D reticulation of a polymeric precursor. This synthesis route leads to a high matter homogeneity and very smooth surfaces, the lack of defects explaining tensile strengths σ r as high as 3 GPa. SiC fibers have been widely studied, especially their aging [2][3][4][5][6][7] which evidenced that densification is linked to compositional changes (for instance the loss of some residual hydrogen [8] ). A peculiarity of ceramics issued from polymeric precursors is no impurities are concentrated at the grains boundaries. Abnormal grain growth is very common in the lack of such usual diffusion regulators [9] and the know-how of SiC fibers manufacturers consists in postponing the onset of SiC crystallization and grain growth, since a high correlation is anticipated with mechanical degradation. A close relationship has been evidenced, for instance, between the micro-hardness and short-range ordering in sol-gel prepared nanocrystalline oxides [10] and some authors have already pointed out fibers overall mechanical ability is governed by their microstructure [5,7,11] .The purpose of this paper is to try correlating, to the best extent possible, the tensile strength (σ r ), the Young's modulus (E) and the micro-hardness (μH) of different SiC fibers, either to Raman spectra or to "Raman Extensometry" S coefficient (measuring the straininduced shifts of Raman bands). Unlike most experimental methods intended to measure directly σ r and E, Raman analysis does not require extracting fibers from the matrix, either by mechanical grinding/crushing [12] or by chemical attack [13] . Only the most resistant fibers are extracted in the former case while fibers surface might be altered in the latter. Besides, it will always be difficult to extract...

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“…The 2660 cm-1 second order Raman peak was used to monitor the fibre strain. The strain dependence of the Raman peak position was determined by using a cantilever beam device [24]. The results shows that a linear relation between compressive strain and Raman peak position is valid, Fig.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Study of the influence of thermal history on the load transfer efficiency and fibre failure in carbon/polypropylene microcomposites using Raman spectroscopy

Nielsen

Pyrz

1998

Composite Interfaces

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Residual stress distribution in carbon fibre/thermoplastic matrix pre-impregnated composite tapes

Cited by 60 publications

References 12 publications

Raman Spectroscopy of nanomaterials: How spectra relate to disorder, particle size and mechanical properties

Raman Spectroscopy of nanomaterials: How spectra relate to disorder, particle size and mechanical properties

Non-destructive mechanical characterization of SiC fibers by Raman spectroscopy

Study of the influence of thermal history on the load transfer efficiency and fibre failure in carbon/polypropylene microcomposites using Raman spectroscopy

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