Effective properties of the octet-truss lattice material

By V. Deshpande, Norman A. Fleck, M. Ashby. 2001

1,582 citations recorded by the source corpus.

The effective mechanical properties of the octet-truss lattice structured material have been investigated both experimentally and theoretically. Analytical and FE calculations of the elastic properties and plastic yielding collapse surfaces are reported. The intervention of elastic buckling of the struts is also analysed in an approximate manner. Good agreement is found between the predictions of the strength and experimental observations from tests on the octet-truss material made from a casting aluminium alloy. Moreover, the strength and stiffness of the octet-truss material are stretching-dominated and compare favourably with the corresponding properties of metallic foams. Thus, the octet-truss lattice material can be considered as a promising alternative to metallic foams in lightweight structures.

Subfields: Building and Construction, Civil and Structural Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/5546579e06284674cac15a22212d79500d1462ce

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Building and Construction

1. H. Wadley
2. V. Deshpande
3. Damiano Pasini
4. Liang Dong
5. Norman A. Fleck
6. R. Hutchinson
7. A. G. Evans
8. J. W. Hutchinson

In Civil and Structural Engineering

1. H. Wadley
2. Norman A. Fleck
3. V. Deshpande
4. A. G. Evans
5. J. W. Hutchinson
6. Damiano Pasini
7. Zhenyu Xue
8. Lorenzo Valdevit

In Mechanical Engineering

1. H. Wadley
2. V. Deshpande
3. Norman A. Fleck
4. A. G. Evans
5. J. W. Hutchinson
6. Lorenzo Valdevit
7. Damiano Pasini
8. Ian Ashcroft

Citations in the corpus

• Compressive behavior of age hardenable tetrahedral lattice truss structures made from aluminium (2004, background): “[4] [5] [6] [7], and silicon brass (Cu–4Si–14Zn wt”
• Saturated pool boiling enhancement using porous lattice structures produced by Selective Laser Melting (2018, background): “Thermophysical properties of FC-72 at 1 atm [34]”
• Ultra-strong architected Cu meso-lattices (2015, background): “In particular, the octet structure, a lattice with face centered cubic arrangement of nodes, is predicted to have a yield strength that scales linearly with relative density, ρ̄, because structural deformation is accommodated by stretching of the lattice members [11].”
• The fracture toughness of octet-truss lattices (2017, methodology): “2b. Fabrication of millimeter scale octet truss lattices has been accomplished using a snap-fit method (Dong et al., 2015; Dong and Wadley, 2015; Finnegan et al., 2007), a reverse assembly technique(Cheung and Gershenfeld, 2013), and an investment casting approach (Deshpande et al., 2001b).”
• The damage tolerance of elastic–brittle, two-dimensional isotropic lattices (2007, background): “There is much current interest in the development of 2D and 3D lattice materials comprising a periodic arrangement of rigid-jointed bars due to their favourable mechanical properties compared to stochastic foams (Deshpande et al., 2001a, b; Evans et al., 2000; Wadley et al., 2003).”