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Maskery, Ian; Aremu, Adedeji; Simonelli, M.; Tuck, Christopher; Wildman, Ricky D.; Ashcroft, Ian; Hague, Richard J.M. (2015)
Publisher: Springer
Languages: English
Types: Article
Subjects:
Significant weight savings in parts can be made through the use of additive manufacture (AM), a process which enables the construction of more complex geometries, such as functionally graded lattices, than can be achieved conventionally. The existing framework describing the mechanical properties of lattices places strong emphasis on one property, the relative density of the repeating cells, but there are other properties to consider if lattices are to be used effectively. In this work, we explore the effects of cell size and number of cells, attempting to construct more complete models for the mechanical performance of lattices. This was achieved by examining the modulus and ultimate tensile strength of latticed tensile specimens with a range of unit cell sizes and fixed relative density. Understanding how these mechanical properties depend upon the lattice design variables is crucial for the development of design tools, such as finite element methods, that deliver the best performance from AM latticed parts. We observed significant reductions in modulus and strength with increasing cell size, and these reductions cannot be explained by increasing strut porosity as has previously been suggested. We obtained power law relationships for the mechanical properties of the latticed specimens as a function of cell size, which are similar in form to the existing laws for the relative density dependence. These can be used to predict the properties of latticed column structures comprised of body-centred-cubic (BCC) cells, and may also be adapted for other part geometries. In addition, we propose a novel way to analyse the tensile modulus data, which considers a relative lattice cell size rather than an absolute size. This may lead to more general models for the mechanical properties of lattice structures, applicable to parts of varying size.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • [1] A. Aremu, I. Ashcroft, R. Wildman, R. Hague, C. Tuck, and D. Brackett, \The e ects of bidirectional evolutionary structural optimization parameters on an industrial designed component for additive manufacture," P. I. Mech. Eng. B- J. Eng., vol. 227, no. 6, pp. 794{807, 2013.
    • [2] G. Chahine, P. Smith, and R. Kovacevic, \Application of topology optimization in modern additive manufacturing," in Solid Freeform Fabrication Symposium, pp. 606{618, 2010.
    • [3] D. Brackett, I. Ashcroft, and R. Hague, \Topology optimization for additive manufacturing," in Solid Freeform Fabrication Symposium, pp. 348{362, 2011.
    • [4] N. Gardan, \Knowledge management for topological optimization integration in additive manufacturing," Int. J. Manuf. Eng., vol. 2014, 2014.
    • [5] D. Brackett, I. Ashcroft, R. Wildman, and R. Hague, \An error di usion based method to generate functionally graded cellular structures," Computers & Structures, vol. 138, no. 0, pp. 102 { 111, 2014.
    • [6] C. Yan, L. Hao, A. Hussein, P. Young, and D. Raymont, \Advanced lightweight 316l stainless steel cellular lattice structures fabricated via selective laser melting," Mater. Design, vol. 55, pp. 533{541, 2014.
    • [7] M. Smith, Z. Guan, and W. Cantwell, \Finite element modelling of the compressive response of lattice structures manufactured using the selective laser melting technique," Int. J. Mech. Sci., vol. 67, pp. 28{41, 2013.
    • [8] K. Ushijima, W. J. Cantrell, R. A. W. Mines, S. Tsopanos, and M. Smith, \An investigation into the compressive properties of stainless steel micro-lattice structures," J. Sandw. Struct. Mat., vol. 13, pp. 303{ 329, 2011.
    • [9] N. A. Fleck, V. S. Deshpande, and M. F. Ashby, \Micro-architectured materials: past, present and future," Proc. R. Soc. A, vol. 466, pp. 2495{2516, 2010.
    • [10] G. W. Kooistra, V. S. Deshpande, and H. N. Wadley, \Compressive behavior of age hardenable tetrahedral lattice truss structures made from aluminium," Acta Mater., vol. 52, pp. 4229{4237, 2004.
    • [11] B. Gorny, T. Niendorf, J. Lackmann, M. Thoene, T. Troester, and H. Maier, \In situ characterization of the deformation and failure behavior of non-stochastic porous structures processed by selective laser melting," Mat. Sci. Eng. A-Struct., vol. 528, pp. 7962{7967, 2011.
    • [12] J. Brennan-Craddock, D. Brackett, R. Wildman, and R. Hague, \The design of impact absorbing structures for additive manufacture," J. Phys.: Conference Series, vol. 382, no. 1, p. 012042, 2012.
    • [13] C. Yan, L. Hao, A. Hussein, and D. Raymont, \Evaluations of cellular lattice structures manufactured using selective laser melting," Int. J. Mach. Tool Manu., vol. 62, p. 32, 2012.
    • [14] R. Hasan, Progressive collapse of titanium alloy micro-lattice structures manufactured using selective laser melting. PhD thesis, University of Liverpool, 2013.
    • [15] S. Tsopanos, R. A. W. Mines, S. McKown, Y. Shen, W. J. Cantrell, W. Brooks, and C. J. Sutcli e, \The in uence of processing parameters on the mechanical properties of selectively laser melted stainless steel microlattice structures," J. Manuf. Sci. Eng. (ASME), vol. 132, p. 041011, 2010.
    • [16] Y. Shen, S. McKown, S. Tsopanos, C. J. Sutcli e, R. A. W. Mines, and W. J. Cantwell, \The mechanical properties of sandwich structures based on metal lattice architectures," J. Sandw. Struct. Mat., vol. 12, pp. 159{180, 2010.
    • [17] L. Gibson and M. Ashby, Cellular Solids: Structure and properties. Cambridge University Press, 1997.
    • [18] M. Ashby, \The properties of foams and lattices," Philos. T. Roy. Soc. A, vol. 364, pp. 15{30, 2006.
    • [19] S. P. Timoshenko and J. N. Goodier, Theory of Elascticity. McGraw-Hill, New York, 1970.
    • [20] R. J. Roark and W. C. Young, Formulas for stress and strain. McGraw-Hill, London, 1976.
    • [21] T. Dillard, Caracterisation et simulation numerique du comportement Mecanique des mousses de nickel: morphologie tridimensionnelle, reponse elastoplastique et rupture. PhD thesis, Ecole Nationale Superieure des Mines de Paris, 2004.
    • [22] D. T. Queheillalt, Y. Katsumura, and H. N. Wadley, \Synthesis of stochastic open cell ni-based foams," Scripta Mater., vol. 50, pp. 313{317, 2004.
    • [23] V. S. Deshpande and N. A. Fleck, \Collapse of truss core sandwich beams in 3-point bending," Int. J. Solids Struct., vol. 38, pp. 6275{6305, 2001.
    • [24] C. Yan, L. Hao, A. Hussein, S. L. Bubb, P. Young, and D. Raymont, \Evaluation of light-weight alsi10mg periodic cellular latticestructures fabricated via direct metal laser sintering," J. Mater. Process Tech., vol. 214, pp. 856{864, 2014.
    • [25] V. Deshpande, M. F. Ashby, and N. A. Fleck, \Foam topology: bending versus stretching dominated architectures," Acta Mater., vol. 49, pp. 1035{1040, 2001.
    • [26] S. Khaderi, V. Deshpande, and N. Fleck, \The sti ness and strength of the gyroid lattice," Int. J. Solids Struct., vol. 51, pp. 3866{3877, 2014.
    • [27] S. Kalidindi, A. Abusa eh, and E. El-Danaf, \Accurate characterization of machine compliance for simple compression testing," Exp. Mech., vol. 37, no. 2, pp. 210{215, 1997.
    • [28] R. Boyer, G. Welsch, and E. Collings, eds., Materials Properties Handbook: Titanium Alloys. ASM International, 2007.
    • [29] M. Donachie, ed., Titanium: A Technical Guide. ASM International, 200.
    • [30] B. Vrancken, L. Thijs, J.-P. Kruth, and J. V. Humbeeck, \Heat treatment of ti6al4v produced by selective laser melting: Microstructure and mechanical properties," J. Alloy. Compd., vol. 541, pp. 177{185, 2012.
    • [31] L. Facchini, E. Magalini, P. Robotti, A. Molinari, S. Hoges, and K. Wissenbach, \Ductility of a ti-6al-4v alloy produced by selective laser melting of prealloyed powders," Rapid Prototyping Journal, vol. 16, pp. 450{459, 2010.
    • [32] S. McKown, Y. Shen, W. Brookes, C. Sutcli e, W. Cantwell, G. Langdon, G. Nurick, and M. Theobald, \The quasi-static and blast loading response of lattice structures," International Journal of Impact Engineering, vol. 35, pp. 795{810, 2008. Twenty- fth Anniversary Celebratory Issue Honouring Professor Norman Jones on his 70th Birthday.
    • [33] M. Simonelli, Microstructure evolution and mechanical properties of selective laser melted Ti-6Al-4V. PhD thesis, Loughborough University, 2014.
    • [34] J.-S. Blazy, A. Marie-Louise, S. Forest, Y. Chastel, A. Pineau, A. Awade, C. Grolleron, and F. Moussy, \Deformation and fracture of aluminium foams under proportional and non proportional multi-axial loading: statistical analysis and size e ect," Int. J. Mech. Sci., vol. 46, pp. 217{244, 2004.
    • [35] U. Ramamurty and A. Paul, \Variability in mechanical properties of a metal foam," Acta Mater., vol. 52, pp. 869{876, 2004.
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