| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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St-Pierre, Luc
Aalto University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2022An Abaqus plug-in to simulate fatigue crack growthcitations
- 2022Fracture of Honeycombs Produced by Additive Manufacturingcitations
- 2021Design, modeling, optimization, manufacturing and testing of variable-angle filament-wound cylinderscitations
- 2021Design, modeling, optimization, manufacturing and testing of variable-angle filament-wound cylinderscitations
- 2021Design, modeling, optimization, manufacturing and testing of variable-angle filament-wound cylinderscitations
- 2021An Abaqus plug-in to simulate fatigue crack growthcitations
- 2021Measuring geometric imperfections of variable–angle filament–wound cylinders with a simple digital image correlation setupcitations
- 2021Measuring geometric imperfections of variable–angle filament–wound cylinders with a simple digital image correlation setupcitations
- 2021Measuring geometric imperfections of variable–angle filament–wound cylinders with a simple digital image correlation setupcitations
- 20203D printing of dense and porous TiO 2 structurescitations
- 20203D printing of dense and porous TiO2 structurescitations
- 2019Effect of weld modelling on crashworthiness optimizationcitations
- 2017The fracture toughness of octet-truss latticescitations
- 2015The dynamic indentation response of sandwich panels with a corrugated or Y-frame corecitations
- 2014The predicted compressive strength of a pyramidal lattice made from case hardened steel tubescitations
- 2012Sandwich Beams with Corrugated and Y-frame corescitations
Places of action
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article
The fracture toughness of octet-truss lattices
Abstract
<p>The only engineering materials with both high strength and toughness, and with densities less than 1000 kg m<sup>−3</sup>, are natural materials (woods) and some plastics. Cellular structures such as the octet lattice, when made from periodic arrangements of strong, low-density metallic trusses, are known to have high specific strengths and elastic moduli. However, much less is known of their resistance to fracture. Here we investigate the fracture toughness of a Ti-6Al-4V alloy octet-lattice truss structure manufactured using a ‘snap-fit’ method. The samples had densities between 360 and 855 kg m<sup>−3</sup> (relative densities of 8–19%) and free truss lengths between 4 and 15 mm. Their fracture resistance was determined using the J-integral compliance method applied to single-edge notched bend specimens. The toughness is shown to increase linearly with the relative density and with the square root of the cell size, while the strength was confirmed to scale only with relative density and the strength of the solid. A moderate increase in resistance with crack length (an R-curve effect) was seen for the higher relative density and larger cell size samples. With a fracture toughness between 2 and 14 MPa m<sup>1/2</sup> and a compressive strength between 20 and 70 MPa, these structures offer a new lightweight engineering material solution for use at temperatures up to 450 °C.</p>