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Rotary machine with a frangible composite blade

  • US 9,243,512 B1
  • Filed: 01/14/2015
  • Issued: 01/26/2016
  • Est. Priority Date: 01/14/2015
  • Status: Active Grant
First Claim
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1. A rotary machine comprising:

  • a plurality of composite blades circumscribing a central longitudinal axis of the rotary machine,the composite blades having a root, a tip, and a span therebetween,a leading edge, a trailing edge, and a chord therebetween,at least one of the composite blades having at least one energy dissipating member extending along the span and distributed along the chord, the at least one energy dissipating member having at least one strand, wherein the at least one energy dissipating member is at least partially covered with a release agent, wherein the at least one energy dissipating member is at least partially co-cured with the at least one of the composite blades, wherein the at least one energy dissipating member comprises at least one damage initiator, wherein the at least one strand is coupled to the at least one damage initiator, wherein the at least one damage initiator comprises at least one pouch, wherein the at least one damage initiator comprises at least one plunger adapted to conform to the at least one pouch, wherein the at least one plunger is coupled to the at least one strand, the at least one pouch being at least partially filled with filler.

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