An approach for design and analysis of composite rotor blades.

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Author
Macedo Moura, Geraldo A.
Date
1989-09Advisor
Kolar, Ramesh
Second Reader
Cantin, Gilles
Metadata
Show full item recordAbstract
The advent of tilt rotor technology asks for rotors that
have different twist and RPM requirements in hover and in
forward flight to optimize for operational conditions. In
order to get an assessment of the capabilities to fulfill
these requirements this report presents a mapping of twist
angle variation as a function of RPM and laminate orientation.
The basic laminate for the six models as well the D-shape spar
that represents the structurally active part of the blade is
assumed to be constant (0°/90°/0°/90°/90°/0°) . This six layer
cross ply laminate is chosen as it provides the necessary
extension-twist coupling without a hygrothermally induced
twist that is highly undesirable. The couplings and trends in
the models are visualized in carpet plots, one for each model,
in an attempt to establish a method to answer the basic
question of the magnitude of twist angle available due to a
particular geometry, material and load system.
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