Effective stiffness and effective compressive yield strength for unit-cell model of complex truss
Source abstract
Abstract
In this study, the objective was to find the effective stiffness and effective strength for an intricate truss model. The model integrates three different types of unit-cell models: a microlattice truss, crossed tetrahedron truss, and regular hexahedron truss. The ideal solutions for the relative density, relative Young’s modulus, and relative compressive yield strength were derived. These were compared with the simulated results of computational models based on aspect ratios (ARs) of 0.2, 0.4, and 0.8 when either the truss diameter or truss length was constant. Commercial software was used for modeling, and the material properties of type 304 stainless steel were applied. The effective stiffness of the unit-cell model of the intricate truss was found to be proportionally correlated with the relative density; the effective strength was correlated with the relative density by a power law of 3/2, which means an open-cell model.
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Research context
OpenAlex topics: Cellular and Composite Structures · Structural Analysis and Optimization · Topology Optimization in Engineering
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References (15)
Show source-provided references
1. Daily, C.S., Lee, D.A., McKitterick, D.D.: Truss structure design, US6170560B1, US6076324, WO1998019843A1 (2001)
2. Deshpande, V.S., Ashby, M.F., Fleck, N.A.: Foam topology: bending versus stretching dominated architectures. Int. J. Solids Struct. 49, 1035–1040 (2001a)
3. Deshpande, V.S., Fleck, N.A., Ashby, M.F.: Effective properties of the octet-truss lattice material. J. Mech. Phys. Solids 49, 1747–1769 (2001b)10.1016/S0022-5096(01)00010-2 ↗
4. Gibson, L.J., Ashby, M.F.: Cellular Solids—Structure and Properties. Cambridge University Press, Cambridge (1997)10.1017/CBO9781139878326 ↗
5. Gȕmruk, R., Mines, R.A.W.: Compressive behaviour of stainless steel micro-lattice structures. Int. J. Mech. Sci. 68, 125–139 (2013)10.1016/j.ijmecsci.2013.01.006 ↗
6. Hutchinson, R.G., Fleck, N.A.: Microarchitectured cellular solids—the hunt for statically determinate periodic trusses. Z. Angew. Math. Mech. 85, 607–617 (2005)10.1002/zamm.200410208 ↗
7. Hutchinson, R.G., Wicks, N., Evans, A.G., Fleck, N.A., Hutchinson, J.W.: Kagome plate structures for actuation. Int. J. Solids Struct. 40, 6969–6980 (2003)10.1016/S0020-7683(03)00348-2 ↗
8. Hyun, S., Torquato, S.: Optimal and manufacturable two-dimensional, Kagome-like cellular solids. J. Mater. Res. 17, 137–144 (2002)10.1557/JMR.2002.0021 ↗
9. Jung, C.G.: Design and development of a metallic sandwich plate with truss type 3-dimensional inner structures. Kaist PhD Thesis (2008)
10. Kang, K.J., Lee,Y.H.: Three-dimensional cellular light structures directly woven by continuous wires and the manufacturing method of the same, US8042312B2, CN1874859A, CN100446888C, DE112004002127B4, DE112004002127T5, US20070095012, WO2005044483A1 (2004)
11. MatWeb Material Property Data: http://matweb.com/search/DataSheet.aspx?MatGUID=abc4415b0f8b490387e3c922237098da&ckck=1 (2013). Accessed 27 June 2013
12. Rehme, O.: Cellular Design for Laser Freeform Fabrication. Schriftenreihe Lasertechnik, 4th edn. Cuvillier, Göttingen (2010)
13. Schaedler, T., Jacobsen, A.J., Torrents, A., Sorensen, A.E., Greer, J.R., Valdevit, L., Carter, W.B.: Ultralight metallic microlattices. Science 18(334), 962–965 (2011)10.1126/science.1211649 ↗
14. Ushijima, K., Cantwell, W.J., Mines, R.A.W., Tsopanos, S., Smith, M.: An investigation into the compressive properties of stainless steel micro-lattice structures. J. Sandw. Struct. Mater. 13(3), 303–329 (2011)
15. Wallach, J.C., Gibson, L.J.: Truss core sandwich panels and methods for making same, US6644535B2, US200201709741 (2002)