SU846684A1 - Laminated cellular panel - Google Patents

Description

I

The invention relates to the construction of multi-layered panels and claddings for general construction and radio engineering purposes made of composite materials.

A laminated panel is known, consisting of skins and a filler formed by one or more sheets of corrugated in one direction. The channels formed by the corrugations have a rectangular, undulating, triangular shape, and can also be made in the form of a “dovetail”. The space inside the channels can be filled with a heat-insulating material 1.

A disadvantage of the known panel is the considerable anisotropy of the mechanical properties due to the layer-by-layer orientation of the filler folds in one direction.

Closest to the invention is a multi-layer cell panel, comprising outer sections and filler layers, made in the form of a cellular type structure, whose cells, facing to the opposite sides, have the shape of polyhedral truncated pyramids, which contact their faces

stringers of triangular or trapezoidal section, with stringers facing their vertices in the direction of the placeholder. The stringers are arranged in different directions with respect to the rows of the cells and are made in the form of separate box-like elements or together with the casings 2.

The disadvantage of this panel is its low mechanical strength, especially in bending, due to the local loss of stability of the skins in the places between two adjacent glueing sites with a cover with skins, accompanied by the occurrence of stresses separating the skins from the core.

The purpose of the invention is to improve the physical and mechanical characteristics of the panel.

The goal is achieved by the fact that

Claims (2)

15 in a multi-layered cellular panel comprising outer skin and a filler made in the form of a structure (cellular type, the cells of which have the shape of many-sided truncated pyramids and are turned in opposite directions with bases, and the stringers are triangular in cross section, placed between the multi-faceted truncated pyramids; peaks in the side of the skins, and the bases are connected to the filler. In addition, flanging can be performed on the tops of the stringers, separate from the skins, parallel to the flange Fig. 1 shows a cross section of a panel with stringers made in conjunction with a cladding, and Fig. 2 is a fragment of a cross section of a panel with a string of a cross section of a panel with a string groove of a triangular section with flanging placed separately from the 0 6 files, in Fig. 3 is a cross-section of a triangular stringer with flanging and truncated corners at the base. In Fig. 4, the corners at the base, fig. a triangular flared stringer, a multilayer mesh panel consists of 1 n external filler skins 2 made of a continuous sheet material in the form of a cellular type structure consisting of protrusions 3, each of which is a truncated polyhedral pyramid. Adjacent protrusions 3 of filler 2 are arranged in mutually perpendicular directions with respect to the plane of their bases. Each of the skins 1 is connected to adjacent surfaces 4 sections of the projections 3 of the filler 2. The projections 3 adjacent to the corresponding skin 1 form a row, in the space between which the stringers 5 of triangular or trapezoidal section are laid. The stringers 5 can be made separately or together with casings and arranged so that one of the vertices 6 of each stringer 5 is trimmed in the direction of the casings 1, and their bases 7 are connected to the filler 2. On the vertices 6 of the stringers, laid separately from the casings 1, flanges 8 are made parallel to the casing 1 and directed in opposite directions. Stringers 5 may be laid in the longitudinal, bead and diagonal directions in relation to the rows of projections 3, as well as at adanal intervals. Stringers 5 moute be molded on continuous lining. The proposed device allows the creation of structurally orthotropic honeycomb panels with mechanically improved X &G; Shaping with the marks of non-glued places ™, en1 eliminates the local loss of stability of the skins in these places and significantly reduces the normal tension of the skins from the filling in the compressed zone. Claim 1. Multi-layered mesh panel comprising outer skin and a filler, made in the form of a cellular type structure, the cells of which have the shape of multifaceted truncated pyramids, and are turned in opposite directions with bases, which are placed between triangular sections, between the truncated pyramids. By the fact that, in order to improve the physicomechanical characteristics, the stringers are turned with their tops towards the linings, and the bases are connected to the aggregate .. 2. The panel according to claim 1, characterized in that flanges are made at the tops of the stringers, parallel to the obshchetka and directed in opposite directions. Sources of information taken into account in the examination 1. US Patent No. 2020639, cl. 161 - 119, 2 USSR Author's Certificate No. 609852, cl. E 04 C 2/24, 1979 duig.1 8 ff