Journal ArticleDOI
Shear behavior of aluminum lattice truss sandwich panel structures
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TLDR
In this paper, the stiffness and strength of 6061-T6 aluminum tetrahedral lattice structures are shown to be comparable to those of conventional 5052-H38 aluminum closed cell hexagonal honeycombs and more than 40% stiffer and stronger than flexible honeycombbs used for the cores of curved sandwich panels.Abstract:
Age hardenable 6061 aluminum tetrahedral lattice truss core sandwich panels have been fabricated by folding perforated sheets to form highly flexible cellular cores Flat or curved sandwich panels can be fabricated by furnace brazing the cores to facesheets Flat sandwich panels with core relative densities between 2 and 10% have been fabricated and tested in the σ ±13 shear orientation (minimum shear strength orientation for a tetrahedral lattice) in the fully annealed (O) and aged (T6) conditions The shear strength of the lattices increased with relative density, parent alloy yield strength and work hardening rate Analytical stiffness and strength predictions agree well with measured values for all relative densities and parent alloy heat treatments investigated The stiffness and strength of 6061-T6 aluminum tetrahedral lattice structures are shown to be comparable to those of conventional 5052-H38 aluminum closed cell hexagonal honeycombs and more than 40% stiffer and stronger than flexible honeycombs used for the cores of curved sandwich panelsread more
Citations
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Porous Metals and Metallic Foams: Current Status and Recent Developments†
TL;DR: Porous metals and metallic foams are presently the focus of very active research and development activities as discussed by the authors, with particular emphasis on research presented at the latest International Conference on Porous Metals and Metallic Foams (MetFoam 2007).
Journal ArticleDOI
Compressive behaviour of stainless steel micro-lattice structures
Recep Gümrük,Robert Mines +1 more
TL;DR: In this paper, the authors investigated the mechanical static compression behavior of 316L stainless steel micro-lattice materials manufactured using selective laser melting method and found that the stiffness and strength of these materials are quite close to experiments.
Journal Article
Advanced Engineering Materials
Journal ArticleDOI
Mechanical properties of an extruded pyramidal lattice truss sandwich structure
TL;DR: In this paper, a combination of extrusion and electrodischarge machining was used to fabricate pyramidal lattice sandwich structures from 6061 aluminum, where the nodes have identical properties to those of the trusses/facesheets.
Journal ArticleDOI
Deformation and Fracture of Impulsively Loaded Sandwich Panels
Haydn N. G. Wadley,Tore Børvik,Lars Olovsson,John Joseph Wetzel,Kumar P. Dharmasena,Odd Sture Hopperstad,Vikram Deshpande,John W. Hutchinson +7 more
TL;DR: In this paper, a model 6061-T6 aluminum alloy system fabricated by friction stir weld joining extruded sandwich panels with a triangular corrugated core was used to investigate the dynamic deformation and fracture processes.
References
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Book
Metal Foams: A Design Guide
Michael F. Ashby,Anthony G. Evans,Norman A. Fleck,Lorna J. Gibson,John W. Hutchinson,Hng Wadley,Feridun Delale +6 more
TL;DR: In this paper, the authors present a model for making metal foams characterisation methods and properties of metal foam, and a constitutive model for metal foam design for Creep with Metal Foams Sandwich Structures Energy Management: Packaging and Blast Protection Sound Absorption and Vibration Suppression Thermal Management and Heat Transfer Electrical Properties of metal Foams Cutting, Finishing and Joining Cost Estimation and Viability Case Studies Suppliers of Metal Foam Web Sites Index
Journal ArticleDOI
Effective properties of the octet-truss lattice material
TL;DR: In this article, the effective mechanical properties of the octet-truss lattice structured material have been investigated both experimentally and theoretically, and the intervention of elastic buckling of the struts is also analysed in an approximate manner.
Journal ArticleDOI
The topological design of multifunctional cellular metals
TL;DR: In this paper, the authors compared the performance of stochastic (foamed) cellular metals with the projected capabilities of materials with periodic cells, configured as cores of panels, tubes and shells.
Journal ArticleDOI
Fabrication and structural performance of periodic cellular metal sandwich structures
TL;DR: The authors showed that truss and textile cores are superior to honeycombs at low relative densities, because of their superior buckling resistance and lower manufacturing cost as well as their multifunctionality.