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Shear-sensitive polymer dispersed liquid crystal

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dc.contributor.advisor Dabiri, Dana en_US Li, Guo Shi en_US 2012-09-13T17:34:13Z 2012-09-13 2012 en_US
dc.identifier.other Li_washington_0250O_10652.pdf en_US
dc.description Thesis (Master's)--University of Washington, 2012 en_US
dc.description.abstract Polymer dispersed liquid crystal has been developed as a shear stress sensor, showing a great signal-to-noise ratio with a high temporal bandwidth. Traditional shear sensing liquid crystal techniques are known to be irreversible processes under practical test conditions. The introduction of polymer into the liquid crystal gives the shear-sensor an additional temporal bandwidth that can be utilized for detecting unsteady flow phenomena. Exploiting a revolutionary dynamic birefringence detecting system known as "Milliview", a series of liquid crystal polymer combinations were tested in a wind tunnel apparatus. The signal strength and the reversibility of the tested combinations are summarized in this paper. The preliminary results showed promising potential in this new sensor system. It demonstrated the capability of the sensor in commercial wind tunnel applications. The dynamic range and the bandwidth of the sensor can be adjusted to fit different application needs. Few combinations presented qualities both in high dynamic range and in broad bandwidth, making them ideal broad purpose sensors. en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.rights Copyright is held by the individual authors. en_US
dc.subject Birefringence; Liquid Crystal; Polarimetry; Polymer; Shear Stress Measurement en_US
dc.subject.other Aerospace engineering en_US
dc.subject.other Chemistry en_US
dc.subject.other Engineering en_US
dc.subject.other Aeronautics and astronautics en_US
dc.title Shear-sensitive polymer dispersed liquid crystal en_US
dc.type Thesis en_US
dc.embargo.terms Delay release for 2 years -- then make Open Access en_US
dc.embargo.lift 2014-09-03T17:34:13Z

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