SU968248A1 - Laminated panel - Google Patents

Description

(54) MULTILAYER PANEL

The invention relates to the creation of power panels in shipbuilding, automotive and seismic resistant structures with high load-carrying and shock-absorbing properties.

Three-layer structures are known in which the outer layers are made of sheet metals, and the middle layer, the aggregate, is made of foam plastic, honeycombs and profiles.

The drawbacks of such constructions are that under the action of intense loads they are deformed randomly with the destruction of the panel package and with a slight increase in absorption. : At the same time, they lose their carrier.

Closest to the proposed technical entity is a multi-layer panel comprising outer sheets and an intermediate layer interconnected by reinforcing rods 2.

However, the npfe action of intense load deformation of the panel occurs randomly with a loss of bearing capacity.

The disadvantages of the known panel are also small damping,

, now and damping properties in the elastic zone of the panel, due to the limited elastic deformations of reinforcing elements; low energy intensity of the panel in the plastic deformation zone, due to the fact that the plastic bending of the rods has a lower energy intensity; low load carrying capacity of the panel with a significant approach of the bearing layers, since the rods lose stability and are deformed randomly, which leads to unequal strength of the panel and a decrease in the carrying capacity.

15

 The aim of the invention is to increase the energy absorption while maintaining the load bearing capacity of the panel.

The goal is achieved by the fact that a multi-layered panel comprising

20, the outer sheets and the intermediate layer, interconnected by reinforcing rods, are bounded around the perimeter by frames rigidly connected to the supporting sheets, and the intermediate

25 layer is made of visco-plastic material with a supporting steel sheet located inside it, made with calibrated and some. libred holes, the uncalibrated holes being provided with plastic polymer inserts rigidly fixed in them through which the reinforcing rods are passed, the latter having a tapered shape, and the edge portions of the outer supporting sheets are corrugated.

FIG. 1 shows a panel in the initial position, a cross section; in fig. 2 - panel in the deformed position, incision; in fig. 3, the panel in the initial and deformed positions, enlarged section in FIG. 4 - central sheet, general view.

The panel consists of outer sheets 1 and 2 and a central carrier sheet 3, which is filled with wafer material IDs stronger than the material of outer carrier sheets 1 and 2. At the intersection of the central carrier ribs, sheet 3 there are holes, some of which are calibrated 4, and in the other 5 plastic inserts 6 are installed, fastened to the carrier sheet 3. Through the inserts b, the rods 7, which have a taper along all their length and that connect the supporting sheets 1-3 to each other, are connected to them with a tight fit. panels. Along the edges of the panel, the outer carrier sheets 1 and 2 are gesture; they are connected to the central carrier sheet 3 by means of frames 9, and the edge sections of sheets 1 and 2 are corrugated to ensure joint movement of sheets 1 and 2 relative to sheet 3, reinforced on the edge sections by plates 10. ., compensating for the partial weakening of the carrying capacity of the panel in these places ..

The assembly of the structure is carried out as follows.

Standard sheets 1-3 and reinforcing rods 7 are manufactured using conventional methods. Calibrated holes 4 and conical holes 5 for plastic inserts 6 are made in the center support sheet 3 in the measures of intersection of stiffeners, and then soldered to the support sheet 3. welding the frames 9 and the plates 10. Plastic inserts 6 with a central hole of a given size are made by casting or die, a nonshrimer of polyethylene, plastic, etc., having a given plasticity, are inserted into the holes 5 and glued to the sheet 3 with its outer surface. The rods 7 are inserted into the holes of the inserts 6 fastened to the center-supporting sheet 3. The assembled part of the panel is placed on the supporting sheet 2, on top of the covers by the supporting sheet 1 and the supporting sheets 1 and 2 with the rods 7 and the frames 9 are fastened ; thereafter, into the inner space of the panel, bounded by frames 9 and outer carrier sheets 1 and 2, heated holes 8 are fed under pressure through the holes in frames 9 and possess a given plasticity, for example, greases, such as cannon fat, greases, etc. with the introduction of these thickener additives are paraffin, graphite, etc. After the material 8 is cooled, the assembly is finished and the holes in the frames 9 are closed.

To ensure the redistribution of forces and deformations and the joint movement of the rods 7 under local loads, the outer carrier sheets 1 and 2 can be reinforced from inside the panel package, for example, foam and other blocks bonded by gluing with the carrier sheets 1 and 2 and reinforcing rods 7 and forming, thus, additional supporting layers of the structure.

Under the action of a load exceeding the force of the resistance of the plastic material 8 to squeezing through the calibrated holes 4 and the force of deformation of the plastic inserts 6 by taper rods 7, the carrier sheet 1 converges (Fig. 2 and 3) with the central carrier sheet 3. As a result; the cavity, limited by the T1a outer sheet 1 and the central sheet 3, is reduced. The plastic material 8 is squeezed through the calibrated holes 4 into the cavity bounded by the carrier 2 and the central 3 sheets, which increases. In this case, the carrier layers 1 and 2 move together relative to the central carrier sheet 3, causing a longitudinal movement of the rods 7 relative to the plastic inserts b, which are squeezed. The depreciation process continues until the load is removed, after which the panel remains in a partially actuated position, or until the bearing plates 1 and 3 touch, after which the panel retains its bearing capacity.

Claims (1)

The positive effect of the proposed design is that energy absorption is carried out not only with preservation of the carrying capacity, but also with preservation of the thickness of the package of layers, which is very important for ensuring the stability of the panel. Another valuable quality of the proposed design is the high stability of the damping characteristics. In addition, the filler panel elements perform two functions: they are the power carriers and reinforcing structural elements and are directly involved in energy absorption. Under okolelnyh loads, the aggregate redistributes forces over a large area due to the plastic material 8, resulting in increased bearing capacity and damping qualities panels. Thus, the proposed panel is characterized by increased enrichment while maintaining the thickness of the panel package and. her carrying her ability, improved stability characteristics of depreciation. Claims of the Invention A multi-layer panel comprising outer sheets and an intermediate layer interconnected by reinforcing rods, characterized in that, in order to increase energy absorption while maintaining the load-bearing capacity of the panel, it is limited along the perimeter with frames rigidly connected to the outer sheets and the intermediate layer made of zkoplastic material with a steel wafer sheet located inside it, made with calibrated and uncalibrated material, and uncalibrated holes fitted rigidly fixed therein pliable polymeric inserts, which are passed through armiruyusch1 e rods, the latter have a tapered shape, and the edge portions are corrugated sheets narlzhnyh. Sources of information taken into account in the examination 1.Prokhorov V.F., Kobelev V., N. Three-layer construction in shipbuilding. L., Shipbuilding, 1972, p. 11, 214, 2, USSR Copyright Certificate No. 295359, cl. B 29 D 3/00, 1972,