Feasibility study of applying an advanced composite structure technique to the fabrication of helicopter rotor blades

Author:: Gleich, D.
Published:: Dec 1, 1972.
Physical Description:: 1 electronic document

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Summary:

The fabrication of helicopter rotary wings from composite materials is discussed. Two composite spar specimens consisting of compressively prestressed stainless steel liner over-wrapped with pretensioned fiberglass were constructed. High liner strength and toughness together with the prescribed prestresses and final sizing of the part are achieved by means of cryogenic stretch forming of the fiber wrapped composite spar at minus 320 F, followed by release of the forming pressure and warm up to room temperature. The prestresses are chosen to provide residual compression in the metal liner under operating loads.

Other Subject(s):

AIRCRAFT

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 19730003304.
Accession ID: 73N12031.
ARDE-J/N-41003.
NASA-CR-112191.

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View MARC record | catkey: 15945009