Paper number 1113
|MATRIX STRAIN FIELD MAPPING AROUND EMBEDDED FIBRES USING POLARISED RAMAN MICROSCOPY|
A.S.Nielsen, J.Schj0dt Thoinsen and R.Pyrz
Institute of Mechanical Engineering, A aTho rg University, Pontoppidanstraede 101, 9220
Aalborg East, Denmark
|Summary||Thermal residual strain distribution in the matrix around embedded fibres in a carbon-polycarbonate single fibre composite has been measured using polarised Raman Microscopy. The method is based on the identification of changes of the molecular orientation distribution due to the presence of the strain field. Molecular orientation distribution is quantified through a series expansion of Legendre functions where the coefficients of the series are determined from the Raman scattering intensities by varying polarisation directions of incident and scattered light. The relation between the elements of the strain tensor and the coeflicients of the Legendre series are obtained by straining the polymer uniaxially at different orientations to the polarisation directions. Results indicate that a quantitative measure of shear strain can be obtained directly from scattering intensities.
||Keywords|| polarised Raman spectrometry, matrix strain measurement. interfacial
shear stress distribution.
Theme : Interface and Interphase ; Mechanical Properties
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