SU1317074A1 - Cellular filler - Google Patents

Abstract

The invention relates to the field of construction. 1, aircraft and shipbuilding, and can be used to manufacture multi-layer panels of variable stiffness for fencing structures. The purpose of the invention is to improve the strength characteristics of the panels by providing variable aggregate stiffness. The cellular aggregate is made in the form of a periodic structure with hollow protrusions 2 molded in mutually perpendicular directions in the form of many-sided truncated pyramids, with bases turned in opposite directions and interconnected by platforms 4 arranged in cross-lines in different levels x Platforms 4, at least in one of the cross rows, are made in a given direction with a stepwise increase in their level with a gradual alignment with the protrusion vertices. The pads 5, located in the transverse direction to the pads 4, are at the same level or also with an increase in the level with their alignment with the tops of the projections 2. 2 ill. from S cl

Description

The invention relates to the construction, aircraft and shipbuilding and can be used in the manufacture of multi-layer panels of temporary rigidity for the construction of fencing.

The aim of the invention is to improve the strength characteristics of the panels by providing variable stiffness of the aggregate.

FIG. 1 shows a cellular sheet according to the invention, an axonometric projection; in fig. 2 - the same, option.

Cellular aggregate is a periodic structure made of sheet stock 1 with hollow protrusions 2 molded onto -Ni, having the form of truncated polyhedral pyramids with flat or slightly convex edges 3. Float; adki 4, which are transitional elements between adjacent protrusions 2, They are located with a stepwise increase in their level to the alignment of the extreme areas with the ridges of the projections. The pads 5, located in the transverse direction with respect to the pads 4, are at the same level (Fig. 1) or are arranged with increasing level with their gradual alignment with the tops of the projections 2 (Fig. 2). A multilayered mesh panel with a size of 800X700 mm was manufactured. The skins are made of two layers of T-10 fiberglass fabric impregnated with binder EF32-301FM by vacuum pressing. The cellular aggregate of the panel was made from a single layer of T-10 glass fabric based on an EF32-301FM binder with a height of 27.5 mm by vacuum pressing. Faw

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In one of the cross rows, the filler pads are made at a variable height with alignment of the outermost with the tops of the protrusions, and the platforms of the other rows are made at the same level. The filler was made on a mechanical mandrel.

The proposed cellular aggregate provides panels with high flexural strength characteristics. Performing platforms at variable height creates variable panel stiffness, which allows them to be used in fencing and enclosures, where a smooth transition from areas with high to areas with low strength characteristics is required, and thereby reducing stress concentration at the joints panels.

Claims (1)

Invention Formula Cellular aggregate, made in the form of a periodic structure with hollow protrusions shaped in mutually perpendicular directions in the form of polyhedral truncated pyramids, with bases turned in opposite directions and interconnected by horizontal platforms located in cross-directed rows in different levels x, characterized in that, in order to improve the strength characteristics of the panels by providing a variable stiffness of the aggregate, the pad in at least one of the cross rows They are located with a stepwise increase in their level to the alignment of the extreme areas with the ridges of the projections.  Pfjf-z Compiled by E. Chern VSKA Editor M. KelemeshT.chred I. VeresKorrektor A. Zimokosov Order 2291/26 Circulation 665 Subscription VNIIPI USSR State Committee do inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4