초록 ▼

A method of fabricating a honeycomb core sandwich structure with an embedded fastener and the resulting structure are disclosed. The method comprises laying down a first nonmetallic synthetic layer (11), preferably a graphite epoxy layer, which may be cured or uncured. Bonded to the first nonmetalli

A method of fabricating a honeycomb core sandwich structure with an embedded fastener and the resulting structure are disclosed. The method comprises laying down a first nonmetallic synthetic layer (11), preferably a graphite epoxy layer, which may be cured or uncured. Bonded to the first nonmetallic synthetic layer is a honeycomb core layer (15) into which one or more flush head fasteners (25) have been inserted. The flush head fasteners are inserted into holes (13) in the honeycomb core that have an indentation (19) at one end that is configured to mate with the underside (21) of the head (23) of a flush head fastener (25). Bonding is accomplished by priming the walls of the honeycomb core layer adjacent the surfaces of the layer, and the fastener, with a suitable primer, preferably before the fastener is installed, and, coating one of the surfaces of the first nonmetallic synthetic layer (11) with a suitable adhesive before joining the first nonmetallic synthetic layer (11) to the surface of the honeycomb core layer (15) containing the head (23) of the flush head fastener (25). Thereafter, the cells of the honeycomb core that surround the fastener are filled with a potting material (35). Then, a second nonmetallic synthetic layer (37) is bonded to the surface of the honeycomb core remote from the surface to which the first nonmetallic synthetic layer (11) is bonded.

대표청구항 ▼

A synthetic skin/honeycomb core sandwich structure with an embedded fastener comprising: a honeycomb core layer; at least one fastener embedded in said honeycomb core layer, said at least one fastener having a shank and an enlarged head witha flat exterior surface, said fastener embedded in said hon

A synthetic skin/honeycomb core sandwich structure with an embedded fastener comprising: a honeycomb core layer; at least one fastener embedded in said honeycomb core layer, said at least one fastener having a shank and an enlarged head witha flat exterior surface, said fastener embedded in said honeycomb core layer such that the flat exterior surface of said head lies co-planar with one surface of said honeycomb core and the shank of said fastener lie transverse to the plane of said honeycomb core layer; potting material located in the cells of said honeycomb core layer that surrounds said at least one fastener; a first nonmetallic synthetic layer bonded to both the surface of said honeycomb core layer that is coplanar with the flat exterior surface of the head of said at least one fastener and the flat exterior surface of the head of said at least one fastener; and, a second nonmetallic synthetic layer bonded to the surface of said honeycomb core layer remote from the surface to which said first nonmetallic synthetic layer is bonded.