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Optimization of ply orientations for multi-layer composite parts

  • US 10,467,350 B2
  • Filed: 02/08/2016
  • Issued: 11/05/2019
  • Est. Priority Date: 02/08/2016
  • Status: Active Grant
First Claim
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1. A method comprising:

  • designing a multi-layer composite part by;

    prior to performing optimization of plies for the composite part;

    pre-generating a library of sublaminates comprising consecutive ply sequences;

    subdividing the part along its depth into blocks that each comprise a contiguous stack of layers within the part;

    identifying rules that constrain how layers that have different fiber orientations are stacked within the part;

    generating a guide for a block that prescribes a fiber orientation for each layer of the block and that complies with the rules after the library has been pre-generated;

    excluding sublaminates that are not compatible with the guide for the block from the library, wherein sublaminates that are compatible with the guide are subsets of the layers in the guide; and

    excluding sublaminates that do not comply with the rules from the library; and

    performing optimization of the plies for the composite part by;

    subdividing the part into panels that each comprise a fraction of the area of the composite part; and

    selecting one of the compatible sublaminates from the library for one of the panels of the block, based on compatible sublaminates for neighboring panels.

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