Abstract: Systems and methods are provided for septa for acoustic cells. One embodiment is a method that includes fabricating a septum of a cell of an acoustic panel, by heating a material into a molten material, depositing the molten material to form a lower chamber of the septum that extends vertically upwards and includes an entry, iteratively depositing layers of the molten material, each layer comprising a filament at the entry that includes overhangs with respect to vertically adjacent layers, and forming openings at locations of the overhangs.

Abstract: Systems and methods are provided for septa for acoustic cells. One embodiment is a method that includes fabricating a septum of a cell of an acoustic panel, by heating a material into a molten material, depositing the molten material to form a lower chamber of the septum that extends vertically upwards and includes an entry, iteratively depositing layers of the molten material, each layer comprising a filament at the entry that includes overhangs with respect to vertically adjacent layers, and forming openings at locations of the overhangs.

Abstract: Systems and methods are provided for septa for acoustic cells. One embodiment is a method that includes fabricating a septum of a cell of an acoustic panel, by heating a material into a molten material, depositing the molten material to form a lower chamber of the septum that extends vertically upwards and includes an entry, iteratively depositing layers of the molten material, each layer comprising a filament at the entry that includes overhangs with respect to vertically adjacent layers, and forming openings at locations of the overhangs.

Abstract: A fiber reinforced polymer part is fabricated by rastering a deposition head over a substrate, and additively forming part features by extruding a polymer having an entrained continuous reinforcement from the deposition head onto a substrate.

Abstract: A composite structure assembly includes a composite core including a flexible base and a plurality of cells extending from the flexible base. The composite core is conformable to different shapes. The plurality of cells are configured to move in response to movement of the flexible base. At least one of the plurality of cells may include a central column connected to a first flared end and a second flared end that is opposite from the first flared end.

Abstract: A composite structure assembly and method of forming a composite structure assembly is provided. The composite structure assembly includes a composite core including a first cell layer having a plurality of first cells and a second cell layer having a plurality of second cells. The first cell layer is adjacent to the second cell layer. The plurality of first cells are fluidly interconnected with the plurality of second cells.

Abstract: Systems and methods are provided for septa for acoustic cells. One embodiment is a method that includes fabricating a septum of a cell of an acoustic panel, by heating a material into a molten material, depositing the molten material to form a lower chamber of the septum that extends vertically upwards and includes an entry, iteratively depositing layers of the molten material, each layer comprising a filament at the entry that includes overhangs with respect to vertically adjacent layers, and forming openings at locations of the overhangs.

Abstract: Sound damping structures and methods for additively manufacturing composite structures having sound damping properties. In some embodiments, sound damping structures may be manufactured according to methods that may include selecting a desired sound damping geometry, inputting a three-dimensional computer-aided design model of the geometry into an additive manufacturing machine, and additively manufacturing a three-dimensional sound damping structure corresponding to the computer-aided design model.

Abstract: A composite structure assembly and method of forming a composite structure assembly is provided. The composite structure assembly includes a composite core including a first cell layer having a plurality of first cells and a second cell layer having a plurality of second cells. The first cell layer is adjacent to the second cell layer. The plurality of first cells are fluidly interconnected with the plurality of second cells.

Abstract: A composite structure assembly includes a composite core including a flexible base and a plurality of cells extending from the flexible base. The composite core is conformable to different shapes. The plurality of cells are configured to move in response to movement of the flexible base. At least one of the plurality of cells may include a central column connected to a first flared end and a second flared end that is opposite from the first flared end.

Abstract: A fiber reinforced polymer part is fabricated by rastering a deposition head over a substrate, and additively forming part features by extruding a polymer having an entrained continuous reinforcement from the deposition head onto a substrate.

Abstract: A fiber reinforced polymer part is fabricated by rastering a deposition head over a substrate, and additively forming part features by extruding a polymer having an entrained continuous reinforcement from the deposition head onto a substrate.

Abstract: Sound damping structures and methods for additively manufacturing composite structures having sound damping properties. In some embodiments, sound damping structures may be manufactured according to methods that may include selecting a desired sound damping geometry, inputting a three-dimensional computer-aided design model of the geometry into an additive manufacturing machine, and additively manufacturing a three-dimensional sound damping structure corresponding to the computer-aided design model.

Abstract: A fiber reinforced polymer part is fabricated by rastering a deposition head over a substrate, and additively forming part features by extruding a polymer having an entrained continuous reinforcement from the deposition head onto a substrate.

Abstract: A method of sending data securely from a client computing device to a server computing device, the client computing device being arranged to store a public encryption key associated with the server computing device and being associated with a user, the user being a registered user on the server computing device, the method comprising: generating a message at the client computing device, the message comprising log-in data relating to the registered user for logging into the server computing device and content data; encrypting the message using the public encryption key; outputting the encrypted message for transmission to the server computing device.

Abstract: Disclosed is a process for the uniform cure of polyurethane elastomers including the steps of mixing polyurethane prepolymers, having free isocyanate groups, with a stable curing agent complex to form a blend, thereafter transferring it to a suitable mold and subjecting it to a predetermined amount of microwave energy until it is substantially cured.