Showing papers on "Sandwich panel published in 1971"
Patent•
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03 Jun 1971
TL;DR: In this article, a sandwich panel multi-sided structure is constructed from a single flat sandwich panel comprising a bendable sheet metal facing and a rigid plywood facing bonded to opposite sides of a plastic foam core.
Abstract: A sandwich panel multi-sided structure mountable on a vehicle body, as a pick-up truck or trailer. The structure is formed from a single flat sandwich panel comprising a bendable sheet metal facing and a rigid plywood facing bonded to opposite sides of a plastic foam core. The core is a compressible expanded polystyrene foam. The panel is provided with spaced pairs of transverse grooves extended through the rigid plywood facing toward the bendable metal facing. The grooves are along the corner sections and divide the panel into a roof section and opposite side sections. The side sections have openings for receiving window structures. The structure is formed by bending the sheet metal facing and compressing the core along the corner sections to form a roof converging outwardly and downwardly from a longitudinal ridge and upright side walls. The back of the pick-up cover is closed with an end wall having a door.
23 citations
Patent•
21 Jun 1971TL;DR: A COMPOSITE SANDWICH PANEL CONSTRUCTION as discussed by the authors has two outer layers attached to OPPOSITE sides of the same CORE, with Z-shaping REINFORCING.
Abstract: A COMPOSITE SANDWICH PANEL TYPE CONSTRUCTION COMPRISING TWO INDEPENDENT OUTER LAYERS ATTACHED TO OPPOSITE SIDES OF FOAMED METAL CORE, SAID CORE HAVING Z-SHAPED REINFORCING ELEMENTS THEREIN. A PREFERRED PANEL CONSTRUCTION HAS ONE OUTER LAYER EXTENDING AROUND SAID FOAMED METAL CORE SO AS TO SUBSTATALLY ENCASE SAID CORE, METHODS OF FABRICATING SUCH A PANEL CONSTRUCTION (1) BY CASTING SAID FOAMED ALUMINUM AROUND SAID REINFORCING ELEMENTS AND SUBSEQUENTLY ATTACHING SAID OUTER LAYERS TO THIS INTERAL METAL FOAM/REINFORCING ELEMENT CORE STRUCTURE, AND (2) BY FIRST PREPARING SAID CORE FROM INDIVIDUAL METAL FOAM PIECES WHICH ARE THEN ATTACHED TO PERFORMED Z-SHAPED REINFORCING ELEMENTS, SAID ASSEMBLED CORE STRUCTURE THEN HAVING THE OUTER LAYERS ATTACHED THERETO. COMPARED TO THE COMPOSITE SANDWICH PANEL CONSTRUCTION HAVING NO Z-SHAPED REINFORCING ELEMENTS IN SAID CORE, THE PRESENT CONSTRUCTION HAS SUBSTANTIALLY IMPROVED STRENGTH.
16 citations
Patent•
09 Apr 1971
TL;DR: A threaded insert to be installed flush with the surface of an outer sheet of a sandwich panel and to be secured in the panel by a hardenable liquid adhesive is described in this paper.
Abstract: A threaded insert to be installed flush with the surface of an outer sheet of a sandwich panel and to be secured in the panel by a hardenable liquid adhesive, the insert having a flange at one end thereof with a tapered, threaded peripheral edge surface, which engages and positively grips the outer sheet along the corresponding edge of an opening in the sheet, through which opening the insert has been installed, so as to retain the insert in place within the sandwich panel, with the flange flush with the surface of the outer sheet, while the adhesive hardens.
16 citations
Patent•
07 Oct 1971
TL;DR: A multi-ply metal-plated sandwich panel made up of: 1. A first (OUTER) PLY of a CORROSION-RESISTant METAL HAVING A THICKness of from 0.05 to 1 MM; 2. A SECOND (INNER) PlY of an ETHYLENE COPOLYMER CONTAINING CARBOXYL GROUPS HAVing A THickness of 0.01 TO 0.4 MM; 3.
Abstract: A multi-ply metal-plated sandwich panel made up of: 1. A FIRST (OUTER) PLY OF A CORROSION-RESISTANT METAL HAVING A THICKNESS OF FROM 0.05 TO 1 MM; 2. A SECOND (INNER) PLY OF AN ETHYLENE COPOLYMER CONTAINING CARBOXYL GROUPS HAVING A THICKNESS OF 0.01 TO 0.4 MM AS A HOTMELT ADHESIVE; 3. A THIRD (INNER) PLY OF A SPECIAL ADHESION PROMOTER HAVING A THICKNESS OF 0.01 TO 0.4 MM; 4. A FOURTH (INNER) PLY OF A THERMOPLASTIC HAVING A THICKNESS OF 2 TO 20 MM; 5. A FIFTH (INNER) PLY OF A SPECIAL ADHESION PROMOTER HAVING A THICKNESS OF 0.01 TO 0.4 MM; 6. A SIXTH (INNER) PLY OF AN ETHYLENE COPOLYMER CONTAINING CARBOXYL GROUPS HAVING A THICKNESS OF 0.01 TO 0.4 MM AS A HOTMELT ADHESIVE; AND 7. A SEVENTH (OUTER) PLY OF A CORROSION-RESISTANT METAL HAVING A THICKNESS OF 0.05 TO 1 MM.
6 citations
11 Mar 1971
TL;DR: In this article, the thermal conductivity of a honeycomb sandwich panel was measured in three characteristic directions in the NLR space simulation chamber, and the results were in good agreement with values calculated for a simplified model.
Abstract: The thermal conductivity of a honeycomb sandwich panel was mesisured in the three characteristic directions. The measurements were carried out in the NLR space simulation chamber. The results are in good agreement with values calculated for a simplified model.
6 citations
TL;DR: In this article, a theoretical analysis for the supersonic flutter of a simply-supported isotropic sandwich panel is presented, where the aerodynamic loading is described by a static approximation valid for a wide range of Mach number, and the effect of rotary inertia, transverse shear, and midplane stress resultants on the critical flutter speed is presented in graphical form.
Abstract: A theoretical analysis is presented for the supersonic flutter of a simply-supported isotropic sandwich panel. The aerodynamic loading is described by a static approximation valid for a wide range of Mach number. Small deflection theory for sandwich plates which considers transverse shear deformations and rotary inertia in addition to bending is used. The purpose of this study is to demonstrate the effect of the rotary inertia parameter on the critical flutter speed of simply-suppor ted panels. Previous investigators have neglected this effect and results obtained are of an anomalous nature for certain plate parameters. The effect of such plate parameters as rotary inertia, transverse shear, and midplane stress resultants on the critical flutter speed are presented in graphical form.
5 citations
TL;DR: In this paper, the theory of Structural Sandwich Panel Design is translated into a form in which it could be used for rapid estimation in a design office, and the authors describe work done to translate the theory to a form that can be used in real time.
Abstract: THIS paper describes work done to translate the theory of Structural Sandwich Panel Design into a form in which it could be used for rapid estimation in a design office.
1 citations
01 Oct 1971
TL;DR: Inconel 625 and Hastelloy X and Inconel X sheet and sandwich panel specimens were used in this paper for low cycle fatigue evaluation of hybrid panels with regeneratively cooled panels.
Abstract: Design data for regeneratively cooled panels from low cycle fatigue evaluation of Hastelloy X and Inconel 625 sheet and sandwich panel specimens
1 citations
01 Jan 1971
TL;DR: In this paper, the fire performance of an aluminum/paper honeycomb structural sandwich panel building was evaluated and concluded that the panel may be limited in its ability to prevent flamethrough under severe fire exposure, but is considered safe from the standpoint of spread of flame along exposed surfaces.
Abstract: Results of laboratory tests to evaluate the fire performance of an aluminum/paper honeycomb structural sandwich panel building are presented. Smoke generation, surface flammability and flame penetration measurements are summarized. It is concluded that the panel may be limited in its ability to prevent flamethrough under severe fire exposure, but is considered safe from the standpoint of spread of flame along exposed surfaces. EVALUATION OF THE FIRE PERFORMANCE OF SANDWICH PANEL USED IN THE MARK III PREFABRICATED LEWIS BUILDING