Assemblies formed by additive manufacturing, radar absorbing structures, and related methods

    公开(公告)号:US11135763B2

    公开(公告)日:2021-10-05

    申请号:US15969005

    申请日:2018-05-02

    Abstract: An assembly formed by additive manufacturing comprises a top face sheet, a bottom face sheet, and a core structure between the top face sheet and the bottom face sheet, the core structure comprising a plurality of cells, wherein structural elements of the core structure defining the plurality of cells exhibit at least one electrical property in at least one direction varying from at least one electrical property in a second, different direction and at least one structural property in at least one direction varying from at least one structural property in a second, different direction, wherein at least a portion of the structural elements comprises a radar absorbing structure, the structural elements comprising a matrix material and at least one additive dispersed in or on the matrix material. Related radar absorbing structures and related methods of fabricating the radar absorbing structures are also disclosed.

    PROCESS FOR REINFORCING CONTINUOUS FIBER ADDITIVELY MANUFACTURED LAMINATES

    公开(公告)号:US20220184880A1

    公开(公告)日:2022-06-16

    申请号:US17122343

    申请日:2020-12-15

    Abstract: A method for fabricating a composite part using a 3D printing machine. The method includes forming the part by depositing a plurality of part layers in a consecutive manner on top of each other where each layer is deposited by laying down rows of filaments made of a thermoplastic composite material. Reinforcing Z-pins are then inserted through the part layers to provide reinforcement of the part in the Z-direction. A plurality of additional part layers are deposited in a consecutive manner on top of each other on the part layers including the reinforcing Z-pins where each additional part layer is also deposited by laying down rows of filaments made of a thermoplastic composite material. Reinforcing Z-pins are also inserted through the additional part layers to provide reinforcement of the part in the Z-direction.

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