Use of Cholesteric Liquid Crystals for Locating Voids in Adhesively Bonded Helicopter Rotor Blades.

摘要

This paper researches the feasibility for using cholesteric liquid crystals for locating the unbonded areas or voids in adhesively bonded helicopter rotor blades. Results of testing two tail rotors are presented and analyzed. A general review of other nondestructive testing methods for rotor blades and a review of liquid crystals is also included. (Author)