Showing papers on "Sandwich panel published in 1970"

Insert for sandwich panels

Abstract: A threaded insert is affixed within a sandwich panel with a hardenable liquid adhesive which is forced into intimate contact with the body of the insert by helical ribs on the body which move the liquid adhesive during insertion of the insert into the panel and are engaged by the adhesive to anchor the insert upon hardening of the adhesive. The body is a composite construction including a metallic threaded member surrounded by a sleeve of molded plastic which carries the helical ribs.

Sectional sandwich panel insert with frictional telescopic coupling

Abstract: A grommet-like insert for sandwich panels consists of two tubular sections, one having a male tip forced into a counterbore in a female skirt on the end of the other section so as to expand the skirt past its elastic limit and into the plastic deformation range, thereby providing a high load bearing capacity. The strength of the coupling is increased by work-hardening which occurs in the expansion of the skirt with a limited compression of the male tip. The diameter of the expanded skirt is substantially increased, and its tip cooperates with the opposed grommet head to grip the panel skin between them to provide high shear resistance.

Method of making foam core sandwich panel

Abstract: A method of making a foam core sandwich panel suitable for use in the building industry by spreading two horizontal panels with a polyurethane foamable resin, allowing the resin to expand partially, then bringing the panel sections with their foam faces together sandwich style, to a vertical position and allowing the foam to complete expansion, coalesce and gel in this vertical position.

Process of making honeycomb panels

Abstract: A HONEYCOMB SANDWICH PANEL MANUFACTURING PROCESS FOR APPLYING AN ADHESIVE TO THE EDGES OF PAPER HONEYCOMB CORE MATERIAL FOR THE APPLICATION OF FLAT SURFACES TO THE HONEYCOMB. PAPER HONEYCOMB WHICH HAS BEEN EXPANDED AND CURED IS COMPRESSED AND AN ADHESIVE IS APPLIED TO THE COMPRESSED HONEYCOMB WHICH IS THEN CAUSED TO EXPAND TO ITS EXPANDED POSITION. THE FLAT SURFACES ARE APPLIED AND PRESSED TO THE TWO EDGES OF THE EXPANDED HONEYCOMB AND THE ADHESIVE CURED FOR SECURING THE EDGE SURFACES OF THE HONEYCOMB TO THE FLAT SURFACES TO FORM THE SANDWICH PANEL.

Sandwich panel insert and installation holder assembly and method of handling

Abstract: A column of sandwich panel inserts each attached to a respective holding tab by a coating of adhesive subsequently operative to attach the tab and insert to a sandwich panel. The insert and tab units are held in coaxial assembly by a wire stringer of hairpin form having respective legs received in peripheral notches in the radial flange heads of the insert, which notches are utilized for injection of potting compound into a hole in a sandwich panel in which the insert is positioned by the tab. The column of inserts and tabs is enclosed in a dust-proof casing having an opener thread for slitting its side for removal of the insert-tab units.

Sandwich-panel building construction

Abstract: A BUILDING IS CONSTRUCTED OF ELONGATED SANDWICH PANELS WITHOUT FRAMEWORK, BY DISPOSING THE SANDWICH PANELS UPRIGHT FOR THE FRONT AND REAR WALLS OF THE BUILDING AND HORIZONTAL FOR THE SIDE WALLS OF THE BUILDING AND HORIZONTAL FOR THE ROOF. THE ROOF CAN BE A SERIES OF INVERTED V''S. THE PANELS ARE CONNECTED BY OVERLAPPING CONNECTORS SECURED ON THE OUTER SIDE OF THEIR OUTER SKINS, AND TO THIS END ARE PROVIDED WITH SPECIAL RIBS AND OVERHANGING EDGE PORTIONS TO WHICH THE CONNECTORS ARE SECURED.

Vibration Control Of Satellite Panels By Means OfPiezoelectric Elements

Abstract: In the present paper a numerical study is conducted on a sandwich panel of a typical communication satellite (ARTEMIS), aiming to investigate the feasibility of vibration reduction by means of piezo elements. A process of optimization of the placement of piezoelectric actuators and sensors has been conducted on the satellite's sandwich panel. Several analysis cases have been considered in the study, by varying the number of sensors/actuators (4 or 6) and of the modes under control (3, 6 or 8). In order to verify the quality of the optimization process several numerical simulations have been performed by varying the sensors/actuators location and feedback gain.

Transient heat flow in three-dimensional sandwich panels

Abstract: An analytical solution has been developed for transient heat flow in a sandwich panel. Unlike most previous studies which treat only a one -dimensional panel, this study treats both twoand three-dimensional panels. The panel is rectangular in shape, with its core material thick in comparison with the top and bottom laminations . Because of the rather general assumptions under which the solution is developed, this solution may be applied to re-entry vehicles, spacecraft, cryogenic storage vessels, or ocean tankers. Out of the infinite series form of the solution, a criterion is developed. This criterion indicates the dimensionality of the problem; it shows when one-, two-, or three-dimensional aspects of the problem need to be considered. Thus, without actually working the problem, the engineer might use this criterion to judge the complexity of a problem.