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Method of making an integrally stiffened article

  • US 5,632,940 A
  • Filed: 03/29/1994
  • Issued: 05/27/1997
  • Est. Priority Date: 03/29/1994
  • Status: Expired due to Fees
First Claim
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1. A method of making an integrally stiffened article, comprising the steps of:

  • providing at least two elongated mandrels;

    individually wrapping each of said at least two mandrels with a first layer of a reinforced polymer composite material extending at least once around each of said at least two mandrels;

    disposing said at least two mandrels in a predetermined adjacent orientation;

    overwrapping a second layer of a reinforced polymer composite material at least once around said at least two mandrels to form a subassembly;

    providing at least one additional elongated mandrel;

    individually wrapping said at least one additional mandrel with a first layer of a reinforced polymer composite material extending at least once around said at least one additional mandrel;

    disposing said at least one additional mandrel in adjacent relation with said subassembly;

    overwrapping a third layer of reinforced polymer composite material around said subassembly and said at least one additional mandrel to form an assembly; and

    curing said assembly to form an article having a plurality of internal integral stiffeners having common fiber reinforcement, with each of said internal integral stiffeners having fiber reinforcement common to said third layer of reinforced polymer composite material.

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