Accession Number : ADA254312


Title :   Measurement of Aerodynamic Shear Stress Using Side Chain Liquid Crystal Polymers


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH


Personal Author(s) : Demandante, Carlo G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254312.pdf


Report Date : Jan 1992


Pagination or Media Count : 75


Abstract : A novel concept was proposed exploiting the optical property response of liquid crystalline materials to various external effects. This study determined the feasibility of using side chain liquid crystal polymers as aerodynamic shear sensors. A method was developed to observe and measure the optical birefringent response of film coatings made from these polymer materials due to applied shear. Different polymers were synthesized, spray-coated and tested for their shear-sensing potential. Empirical results confirmed the promise of this method on future aerodynamic testing.


Descriptors :   *OPTICAL PROPERTIES , *POLYMERS , *SHEAR STRESSES , *AERODYNAMICS , *LIQUID CRYSTALS , OPTICS , DETECTORS , FILMS , COATINGS , BIREFRINGENCE , INFRARED SPECTRA , SPRAYS , EXTERNAL , CHAINS , RESPONSE , CRYSTALS , THESES , FLUORESCENCE , LIQUIDS , MATERIALS


Subject Categories : Aerodynamics
      Polymer Chemistry
      Optics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE