As a sandwich panel with a honeycomb core ( abbreviated honeycomb paneling ) is a three-layer composite construction in a sandwich construction referred to, which consists of two bearing cover skins and a core support in honeycomb form. The support core is also referred to as an English Honeycomb ( German honeycomb ), and can be made of cardboard, resin-impregnated paper, nonwoven or plastic thin aluminum foils. The cover skins can be made of cardboard, plastic, fiber composites, or sheet metal. Various combinations of materials between the support core and cover skins are possible; Support core and skins are usually glued.
Principle of operation and physical operating limits
The sandwich panel accepts the principle of the double - T-beam for the tensile structure by provide the thin integuments, with its large distance from the central area for a large area moment of inertia and thus a high bending stiffness, while the supporting core generates the same shear stiffness and the integuments continuously against bumps and wrinkles supported.
The sandwich plate with foam core sandwich panels as an alternative construction is cheaper to manufacture, but not as heavy duty. Sandwich panels with honeycomb core are designed in spite of the non-rotating symmetric hexagonal shape of the honeycomb with quasi- isotropic bending stiffness, and found as a typical design of lightweight construction, among others for aircraft engines.
Material of the support core
Honeycomb board with a supporting core of paper or cardboard can be equipped so that they can be loaded with more than 50 tons per square meter. The cover skins can be designed as natural wood board, particle board or MDF. With the same bending strength, the density is significantly reduced in comparison to a solid particle board.
The lightweight design with raw materials counteracts a future shortage of raw materials to wood, lowers transportation costs, improves assemblability and made possible by lower static loads constructions with higher payload.
Typical applications of the honeycomb plate with paper core are trade show exhibits, partitions, prefabricated houses, scenery and stage, sliding doors, acoustic construction, flooring systems, stairs, ceiling panels, wall cladding, caravan, shelving and furniture.
Daniel Libeskind has the 2002 Hiroshima Art Prize for his models obtained which consist exclusively of Pappwabenplatten.
Plastic and composite fiber material
Honeycombs are manufactured from plastics such as polypropylene or polycarbonate. Technical honeycombs are produced by the bonding produced by extrusion tubes which result from dividing the plate material.
Aramid fibers are also used, such as Kevlar and Nomex paper paper. These are coated with synthetic resin such as epoxy or phenol resin so as to increase stability and to prevent the absorption of fluid.
For is also used aluminum, especially in the aviation and aerospace technology. To take advantage of the tensile strength of aluminum covering skins, a honeycomb core made of aluminum is required.
Through the honeycomb structure of the material creates a high mechanical rigidity with relatively low weight, which makes them attractive Honeycombs in conjunction with the sandwich construction and Others for air, marine and aerospace industries. So lightweight hulls, surfboards, and truck bodies are called Honeycomb panels in aircraft control surfaces and wing- employed. For some years polyurethane fiber glass honeycomb parts in automobiles are used as spare tire covers, rear shelves and sliding sky.