HYBRID COMPOSITE FOR EROSION RESISTANT HELICOPTER BLADES
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United States of America Patent
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Issued Date -
Jan 16, 2014
app pub date -
Sep 6, 2013
filing date -
Jun 24, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A protective hybrid composite for a rotor blade is based on the use of tape cast ceramic layers densified by pre-ceramic polymer infiltration methods and laminated together with polymer matrix composite prepregs, with or without an embedded metallic mesh, to form a conforming helicopter blade cladding that is laminated to the blade surface for added erosion protection. The hybrid composite is fabricated to net shape and laminated to the blade using either an adhesive or a polymer composite prepreg inner layer. Installation is accomplished by a standard composite fabrication method of vacuum bagging the blade while the system is laminated to its surface. Repair methods based on removal of ceramic tiles is facilitated by incorporation of a metallic mesh element laminated beneath the ceramic tiles that can be used to heat the tile and decrease its adhesion strength.
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