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Wrinkle Reduction in Formed Composite Laminates

  • US 20170368815A1
  • Filed: 06/28/2016
  • Published: 12/28/2017
  • Est. Priority Date: 06/28/2016
  • Status: Active Grant
First Claim
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1. A method of making a composite laminate part exhibiting reduced wrinkling, and having a desired contour along a major axis of loading:

  • laying up a substantially flat stack of fiber plies each having a unidirectional fiber orientation, wherein at least some of the plies provide the part with primary axial stiffness along the major axis of loading, including orienting the plies providing the primary axial stiffness at off-angles relative to the major axis of loading;

    forming the stack to a desired cross sectional shape; and

    ,forming the stack to the desired contour along the major axis of loading,wherein during the forming, strain on the plies providing the primary axial stiffness is reduced by their off-angle orientation.

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