Analysis of the single-fibre pull-out test by means of Raman spectroscopy: Part II. Micromechanics of deformation for an aramid/epoxy system

Bannister, D.J.; Andrews, M.C.; Červenka, A.; Young, Robert J.

doi:10.1016/0266-3538(95)00030-5

Cited by 78 publications

(45 citation statements)

References 21 publications

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“…All measured specimens show the typical non-linear strain distribution between the matrix and the wood strand, as observed by other researchers (Bannister et al 1995;Zhandarov and Pisanova 1997;Yue and Looi 2001). The strains shown in Figs.…”

Section: Discussionsupporting

confidence: 81%

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Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Frybort¹,

Mauritz²,

Teischinger³

et al. 2012

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This study investigates the bonding behaviour of Norway spruce wood strands to a surrounding cement matrix. Effects of wood swelling and shrinking during cement curing were studied by using strands of various thicknesses. The deformation of the spruce wood strands and the surrounding cement matrix, as well as the interface between the wood and the cement were examined using Electronic Laser Speckle Interferometry (ESPI) while applying a pull-out load. Sample deformation was transformed to shear strain maps, showing which side of the strand was tightly bonded to the cement matrix. The analysis of the strain maps proved that all strands were tightly bonded to the cement matrix on only one side. No shear deformation was observed on the loosely bonded side, meaning that there was no adhesion on that side between the wood strand and the cement matrix. Manufacturing of strands results in different surface characteristics and surface roughness. Bringing together the ESPI results with the roughness measurements, it was shown that only the comparably rougher surface adheres to the cement matrix. In a cement bonded composite (CBC) made of lignocellulosics to a greater or lesser extent, only half of the contact area is therefore able to transfer load.

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Section: Discussionsupporting

confidence: 81%

“…The pull-out test, an established method to determine shear bond characteristics, is used to examine bonding behaviour (Bannister et al 1995;Brandt 1995;Banholzer 2006;Frybort et al 2010). Analysis of the load-displacement curve helps determine the location where de-bonding occurs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Frybort¹,

Mauritz²,

Teischinger³

et al. 2012

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“…For many high-performance fibres the peak positions of certain Raman bands have been demonstrated to shift to lower wavenumber by the application of tensile stress [5][6][7][8][9]. For all the fibres used in this study there is an approximately linear shift of the peak wavenumber, , with axial fibre strain, e f .…”

Section: Single Fibre Deformation In Airmentioning

confidence: 68%

“…This is done by establishing a link between conventional strength based theory [6][7][8][9], micromechanical considerations and experimental data obtained using Raman 3 spectroscopy to follow the deformation micromechanics of the fibre/matrix interface in model composites where a matrix crack has been propagated.…”

Section: Introductionmentioning

confidence: 99%

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A strength based criterion for the prediction of stable fibre crack-bridging

Bennett¹,

Young²

2008

Composites Science and Technology

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Analysis of Strain and Stress in Ceramic, Polymer and Metal Matrix Composites by Raman Spectroscopy

Colomban¹

2002

Adv. Eng. Mater.

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Raman scattering is a unique tool providing information on the structure and short‐range order of matter. Stress‐induced Raman shifts can be used to determine the stress/strain in films, fibres, particulate composites and, more generally, in any phase a few microns or more in scale. Quantitative results follow from a wavenumber calibration as a function of tensile strains or pressures applied to reference fibres or crystals. Furthermore, if the material is coloured, (near) resonant Raman scattering occurs, which enhances the scattered light intensity and simplifies the spectra – especially for harmonics – but drastically reduces the analysed volume (in‐depth penetration ∼10–100 nm). This paper discusses the effective and potential advantages/drawbacks of Raman micro‐spectrometry technique. The procedures to improve the sensitivity, the legibility and the reliability will be addressed. Examples will be chosen among (aramid, C, SiC) fibre‐ reinforced ceramic (CMCs), polymer (PMCs) or metal matrix (MMCs) composites.

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Analysis of the single-fibre pull-out test by means of Raman spectroscopy: Part II. Micromechanics of deformation for an aramid/epoxy system

Cited by 78 publications

References 21 publications

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

A strength based criterion for the prediction of stable fibre crack-bridging

Analysis of Strain and Stress in Ceramic, Polymer and Metal Matrix Composites by Raman Spectroscopy

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