The invention relates to a composite sandwich base panel for a Unit Load Device. The panel comprises an upper surface layer comprising fibre reinforcement material, a lower surface layer comprising fibre reinforcement material, and a central core section where at least the majority comprises a plurality of particles bound in a matrix material. The upper surface layer and lower surface layer are provided with a matrix material to bind them to the central core section.

The present invention proposes a novel construction system consisting of the attachment of modified hyperboloid shaped-structural elements called laminate cells which, when working together, create a structural system with integrated over having the capacity of absorbing and transmitting in all directions and orientations.

The present invention proposes a novel construction system consisting of the attachment of modified hyperboloid shaped-structural elements called laminate cells which, when working together, create a structural system with integrated over having the capacity of absorbing and transmitting in all directions and orientations.

What is presented is a unit cell comprising a cellular geometry that comprises cell walls and cell edges arranged into a combination of a cubic cell geometry and a tetrahedral cell geometry arranged to have a coincident central vertex. The cubic cell geometry comprises three orthogonal cell faces that intersect at its central vertex. The tetrahedral cell geometry comprises an arrangement of eight tetrahedral cells that share its central vertex such that each tetrahedral cell shares three coincident edges with three other tetrahedral cells in a cubically symmetric arrangement. The tetrahedral cell geometry is combined with the cubic cell geometry such that all vertices of the tetrahedral cell geometry are coincident with the vertices of the cubic cell geometry.

A panel assembly for use in an aircraft includes a surface. The panel assembly further includes a body portion including a honeycomb material having multiple body volumes oriented perpendicular to the surface. The panel assembly further includes an edge portion extending around an edge of the panel assembly and including the honeycomb material having multiple edge volumes oriented parallel to the surface in order to increase edge strength of the panel assembly.

An example method for manufacturing a multicellular structure for acoustic damping is described that includes applying a porogen material to a solid support, inserting a multicellular frame into the solid support and through the porogen material so as to fill cells of the multicellular frame with the porogen material, fusing the porogen material, removing the multicellular frame from the solid support, and the multicellular frame contains a suspended fused porogen network attached to walls of the cells of the multicellular frame. The method also includes applying a solution to the suspended fused porogen network in the cells of the multicellular frame to percolate the suspended fused porogen network, curing the solution, and removing the suspended fused porogen network from the multicellular frame resulting in porous septum membranes of the cured solution in cells of the multicellular frame.

The present invention provides a honeycomb structure formed from a thermoplastic resin composition comprising: aromatic polyamide (A) which includes diamine units containing at least 70 mol % of xylylenediamine units and dicarboxylic acid units containing at least 50 mol % of C.sub.4-20 ,-linear aliphatic dicarboxylic acid units; and aliphatic polyamide (B) which includes aliphatic groups as repetitive units and in which the total of 10 to 24 carbons form the aliphatic groups. The composition ratio of aromatic polyamide (A):aliphatic polyamide (B) is within a range of 100:25 to 400 by mass standard. Also provided is a sandwich structure obtained by disposing flat plates at the top surface and bottom surface of the honeycomb structure, and a honeycomb substrate obtained by molding the thermoplastic resin composition into a film or a sheet.

A composite panel for use in applications such as mobile homes, boats, buses, RVs, or other panels used typically in transportation applications, where a single piece, water resistant, lightweight panel with patterned high-strength areas is needed. The composite panel generally includes internal preforms made of low-density material such as urethane foam, which create patterned structural portions of the panel during the molding process. The patterned structural portions are formed by a maze-like region within a mold, into which composite matrix material is infused. The patterned structural portions have high strength compared to the other regions of the panel, and can be used for structural support or for retaining fasteners for appliances, walls, etc.

A composite panel for use in applications such as mobile homes, boats, buses, RVs, or other panels used typically in transportation applications, where a single piece, water resistant, lightweight panel with patterned high-strength areas is needed. The composite panel generally includes internal preforms made of low-density material such as urethane foam, which create patterned structural portions of the panel during the molding process. The patterned structural portions are formed by a maze-like region within a mold, into which composite matrix material is infused. The patterned structural portions have high strength compared to the other regions of the panel, and can be used for structural support or for retaining fasteners for appliances, walls, etc.

Disclosed is a method for forming a hollow pipe-sandwiching metal plate and applications thereof. The hollow pipe-sandwiching metal plate comprises a first panel, a second panel, and multiple hollow pipes between the first panel and the second panel; gaps are arranged among the hollow pipes, and the hollow pipes are connected to the first panel and the second panel by brazing. The present disclosure further includes the applications of the hollow pipe-sandwiching metal plate. The hollow pipe-sandwiching metal plate has advantages, such as light weight, high strength, low stress, high temperature resistance, pressure bearing, thermal insulation and vibration isolation. The metal plate will not deform due to thermal difference, thereby providing permanent service life of the metal plate.