Jérôme HALARY - Academia.edu (original) (raw)
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Graduate Center of the City University of New York
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The project is concerned with the development of polymeric coatings for use as remotely-sensed no... more The project is concerned with the development of polymeric coatings for use as remotely-sensed non-contact strain gauges whereby the strain is measured using stress-induced Raman band shifts. The aim is to measure local strain on the micron level and so it is necessary to use materials with microstructures in the nanometer size range. Nanostructured coating materials based upon polyurethane polymers with low vol. fractions (<0.1%) of single-walled carbon nanotubes have being developed that give both well-defined Raman spectra and large stress-induced band shifts. Through the use of the polarization of the Raman laser beam it is possible to measure strains in different directions and hence det. the principal strains. A remote Raman microprobe with a laser beam focused to 1 m has been employed using a fiber optic link to the spectrometer. Examples will be given of the use of the coatings to monitor the deformation of a no. of different substrates such including aluminum and polymer sheets. [on SciFinder (R)]
Advanced Engineering Materials, 2004
MRS Proceedings, 2004
ABSTRACTCarbon nanotubes nanocomposites with unique opto-mechanical properties have been develope... more ABSTRACTCarbon nanotubes nanocomposites with unique opto-mechanical properties have been developed as smart coatings. Remote polarized Raman spectroscopy has been used to monitor optical strain sensitivity of deformed coatings and determine local strains on the micron scale directly from stress/strain induced Raman band shifts.Chemically engineered carbon nanotubes and polymer matrices have been developed in order to overcome the limitations highlighted in previous reports. They have proved to be of significance importance in the optimization of the stress transfer between the nanotubes and the polyurethane matrix.
ABSTRACTNanocomposites and nanostructured polymers with unique opto-mechanical properties have be... more ABSTRACTNanocomposites and nanostructured polymers with unique opto-mechanical properties have been developed as smart coatings for use in a novel, high resolution, and non-contact strain-measuring application. Remote polarized Raman spectroscopy has been used to monitor optical strain sensitivity of deformed coatings (deformation micromechanics), and determine local strains on the micron scale directly from stress/strain induced Raman band shifts.The research is aimed at providing a novel high-resolution non-contact technique for the determination of surface stresses and strains in a wide variety of engineering components used in both laboratory and in-the-field (external) applications.
The project is concerned with the development of polymeric coatings for use as remotely-sensed no... more The project is concerned with the development of polymeric coatings for use as remotely-sensed non-contact strain gauges whereby the strain is measured using stress-induced Raman band shifts. The aim is to measure local strain on the micron level and so it is necessary to use materials with microstructures in the nanometer size range. Nanostructured coating materials based upon polyurethane polymers with low vol. fractions (<0.1%) of single-walled carbon nanotubes have being developed that give both well-defined Raman spectra and large stress-induced band shifts. Through the use of the polarization of the Raman laser beam it is possible to measure strains in different directions and hence det. the principal strains. A remote Raman microprobe with a laser beam focused to 1 m has been employed using a fiber optic link to the spectrometer. Examples will be given of the use of the coatings to monitor the deformation of a no. of different substrates such including aluminum and polymer sheets. [on SciFinder (R)]
Advanced Engineering Materials, 2004
MRS Proceedings, 2004
ABSTRACTCarbon nanotubes nanocomposites with unique opto-mechanical properties have been develope... more ABSTRACTCarbon nanotubes nanocomposites with unique opto-mechanical properties have been developed as smart coatings. Remote polarized Raman spectroscopy has been used to monitor optical strain sensitivity of deformed coatings and determine local strains on the micron scale directly from stress/strain induced Raman band shifts.Chemically engineered carbon nanotubes and polymer matrices have been developed in order to overcome the limitations highlighted in previous reports. They have proved to be of significance importance in the optimization of the stress transfer between the nanotubes and the polyurethane matrix.
ABSTRACTNanocomposites and nanostructured polymers with unique opto-mechanical properties have be... more ABSTRACTNanocomposites and nanostructured polymers with unique opto-mechanical properties have been developed as smart coatings for use in a novel, high resolution, and non-contact strain-measuring application. Remote polarized Raman spectroscopy has been used to monitor optical strain sensitivity of deformed coatings (deformation micromechanics), and determine local strains on the micron scale directly from stress/strain induced Raman band shifts.The research is aimed at providing a novel high-resolution non-contact technique for the determination of surface stresses and strains in a wide variety of engineering components used in both laboratory and in-the-field (external) applications.