Abstract
Support structures are required in several additive manufacturing (AM) processes to sustain overhanging parts, in particular for the production of metal components. Supports are typically hollow or cellular structures to be removed after metallic AM, thus they represent a considerable waste in terms of material, energy and time employed for their construction and removal. This study presents a new approach to the design of support structures that optimise the part built orientation and the support cellular structure. This approach applies a new optimisation algorithm to use pure mathematical 3D implicit functions for the design and generation of the cellular support structures including graded supports. The implicit function approach for support structure design has been proved to be very versatile, as it allows geometries to be simply designed by pure mathematical expressions. This way, different cellular structures can be easily defined and optimised, in particular to have graded structures providing more robust support where the object’s weight concentrate, and less support elsewhere. Evaluation of support optimisation for a complex shape geometry revealed that the new approach presented can achieve significant materials savings, thus increasing the sustainability and efficiency of metallic AM.
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Allen S, Dutta D (1995) Determination and evaluation of support structures in layered manufacturing. J Des Manuf 5:153–162
Frank D, Fadel G (1995) Expert system-based selection of the preferred direction of build for rapid prototyping processes. J Intell Manuf 6(5):339–345
Gabrielli, R. (2009). Foam geometry and structural design of porous material. Mechanical Engineering. Thesis (Doctor of Philosophy (PhD)). University of Bath
Goldstein H, Poole, CP, Safko, JL (2002) Classical mechanics, 3rd edition. Addison Wesley, ISBN 978-0-201-65702-9
Hao L, Raymond D et al (2011) Design and additive manufacturing of cellular lattice structures. The International Conference on Advanced Research in Virtual and Rapid Prototyping (VRAP). Taylor & Francis Group, Leiria, pp 249–254
Materialise, N. from www.materialise.com, Materialise develops 3D software for the medical, dental and additive manufacturing industries
Pasko A, Vilbrandt T et al (2010) Procedural function-based spatial microstructures. Shape Modeling International Conference (SMI), 2010
Pham DT, Demov SS (2001) Rapid manufacturing: the technologies and applications of rapid prototyping and rapid tooling. Springer, London
Putte BS, Bornem JP et al (1997) Method for supporting an object made by means of stereolithography or another rapid prototype production method. Materialise, Belgium
Schoen AH (1970) Infinite periodic minimal surfaces without selfintersection. National Aeronautics and Space Administration, Cambridge
Schwarz HA (1890) Gesammelte Mathematische Abhandlungen. Berlin, Springer (Reprinted by Chelsea Publishing Company, 1972, 1890)
Starly B (2006) Biomimetic design and fabrication of tissue engineered scaffolds using computer aided tissue engineering. Department of mechanical engineering and mechanics, Drexel University
Swaelens B et al (1995) Support generation for rapid prototyping. Sixth International Conference on Rapid Prototyping, University of Dayton
Wang H, Chen Y et al (2005) A hybrid geometric modeling method for large scale conformal cellular structures. ASME Conference Proceedings
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Strano, G., Hao, L., Everson, R.M. et al. A new approach to the design and optimisation of support structures in additive manufacturing. Int J Adv Manuf Technol 66, 1247–1254 (2013). https://doi.org/10.1007/s00170-012-4403-x
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DOI: https://doi.org/10.1007/s00170-012-4403-x